I'm your student from Haiti.and I enjoy watching your videos carefully,plus every words will come out of your mouth are from a good pro and teacher.and i feel so great when im watching you teacher
those shops do not have true "diagnostic" technicians that solve problems instead of applying a band-aid. True diag tech find employment where they are compensated for their knowledge and finely tuned skillset.
Amazing. You are single-handedly creating an army of automotive diagnosticians. Imagine what the world would be like if every single person was able to find their life's true calling like you have, Paul. You are truly a gift from God to the rest of humanity.
Man, that is quite the compliment. In my knowledge of our Creator, and to keep my pride at bay, I will say this: I can do all things through Christ who strengthens me.
Just finished a crank no start on a Toyota Tacoma 2003 with a 2.7l engine. No communication with my scanner. So I Dannered the vehicle. Check for 5 volt ref and found low voltage. Checked tail relay and it was defective. Replaced and problem fixed. Another one bites the dust. I learned this from the man .Paul Danner and his awesome teachings. Thank you once again . Jose from Puerto Rico. Scanner Danner Premium is a must.
I love it when you have your students around asking questions and you address them on the video since it's kind of like they're representing all of us less experienced guys and they're asking questions we would ask. I hope you do more like this... Thanks for the videos!
Don’t think mr danner fools about, even the fact you teach your experience online, have a few students standing at your shoulder with the odd comment of curiosity, you just roll with your diagnoses, it’s great to watch and even you have pride to double check what you say is honesty , to many people out there go for the quick change ( every part scenario till it’s starts ££££$$$$$) keep up the the great work👍🏻 the world is watching a master 👍🏻 keep on rolling sir , all the best from the uk 🇬🇧
I have been a mechanic off and on for the past 23 years. Electrical diagnostics has always been my weakest link, yet just watching this video alone has made so much sense that I can't believe I didn't "get it" beforehand. I am acutally contemplating looking into your online courses because I can obviously learn really well from your teaching methods. I want to thank you for the time and effort you put into your work, and you have every right to be very proud of any mechanics/technicians that you put out there in the workplace. Again, thank you.
Thank you so much Stefan! Look forward to hearing from you in the comments should you decide to join www.scannerdanner.com/join-scannerdanner-premium.html
What a valuable lesson! Checking 5 volt reference has saved me alot of time. Never trust a relay that clicks. Someone replaced a lot of parts because of a bad relay. 30 years in the business and I'm still learning new techniques. Great video Paul. Thanks for sharing.
This is a perfect example of real world symptom and diagnosis . The fact that you stopped after repairing initial complaint shows that you are a money making machine . Great video that can show what ALL auto shops need to do .
Great video Paul. What the consumer DOES NOT understand is the fact that the Tech/mechanic needs both the TRAINING and TOOLS in order to do a proper diagnosis. You can't have one without the other. Training and Tools cost money, you NEED to recoup your money or you will not be in business for very long. This is why you/we charge what we do. Yes, it took me 5 minutes to find the problem, but I did find the problem. No PARTS cannon was used. Keep up the good fight.
Hello from England. I'm a newbie to your channel and I like what I see. Your a brilliant teacher! and I find myself glued to the computer whilst watching you diagnose none starters like the car in this video. Im not a mechanic, just an old bloke with old school interests in mechanics. Keep up the great work, Im hooked. :-)
Thanks man. It was going to be too but you guys have been waiting for awhile and we are still about 12 days away from getting ScannerDanner Premium moved to my website. And I was certainly not uploading anything more to ScannerDanner Premium on UA-cam.
I would love to be your student when you are troubleshooting! This is exactly how good mechanics are made. Using your head and truly understanding what is happening with components one by one and ruling out unnecessary tracing, saving time, which in turn makes you more money! I’m glad I found your videos bcuz I live for this stuff, thank you!
Separate problem, separate diagnostic.....so many people do not understand this point. Car was a "no start" problerm...It now starts. Great diagnostice routine video, well done! and I thought as I watched "wish he would have disassembled theat relay"....BOOM bonus footage, excellent. "Never trust a relay that clicks"..all techs should put that on page one of their notes.
Tail end of the video, you hit the nail on the head!! How much money have we techs spent on the tools needed to get the job done!! So we not only need the education but without the tools nothing can be fix!
i really enjoy electrical problems. i can hear the excitement in your voice as you are "on the hunt". makes it very exciting for your students. i use a primitive way of checking load and control side of relays....i use jumpers that allow me to check voltage, ground and load amps...same result just with a home made jumper...sever pins sizes also. great video. really enjoyable. loved hearing the students getting involved and thinking through it!
Weird that this video just dropped into my phone's playlist. I have a customer with a 2007 Mitsubishi Outlander with the exact same problem ... no comm, no crank, no start, no 5V reference, cooling fans on with 12 VDC going into the MFI relay, and 1.98 VDC coming out (circuit under load). The output from the relay sends power to four fuses (PCM, fuel injectors, ignition coils, sensors). I think I found the problem. Great video Paul!
Paul, on this 2007 Outlander, the 5 v reference appears to be 12 volts. After the MFI relay power flows to a 20 amp fuse; from there, power flows to the O2 sensors, IAC, Evap Purge solenoid, injector relay, and back to the PCM. Do some cars use 12 volts instead of 5? I don't see a "5 v ref" line in the schematic.
@@superk4562 where are you testing the ref circuit? Unplug your ECT and measure there (must be unplugged) Or on your TPS or MAP (those can be left plugged in or unplugged
I love it when a customer gets the bill and says you just replaced a relay! Like when I charge for an EVAP test (I charge a test fee for machine plus labor to inspect and repair) and they say you just replaced a gas cap! They have no idea what it costs to run a full service automotive shop. We need to be paid.
@@Re-tirados yes equipment and time and most of all your knowledge and the expense and time it takes from your life ( although it is a passion for learning and fixing things that not everyone can fix that runs in your veins) you need to be compensated for it. When you get top dollar for you expertise then it makes it all worth your while.
This has been one of the best vids yet Scanner! Of course all of them are a cut above spectacular. I couldn't help but think of sanding the points when I saw those dirty contacts in that relay. Todays generation may not know what points are but back in the day now and then you had to sand the points to get going again. I had an old boat like that once and I had to sand the points to get back in darn near ever time I took it to the lake. The happiest 2 days in my life was the day I bought it and the day I sold it. I bet if someone just knew where to look, sanding those contacts in that relay would have gotten it going again at least temporarily.
Blade cleaning the carbon off the contacts may not work most of the times cause what broke exactly is the latch coil, i am pretty sure its gonna have way less resistance than normal when this happens, the magnetic field ain't strong enough to support the bridge
My favorite video is the one where they had that chevy impala, i think, with the crank sensor code and it was a short in the wiring harness goin to the cam sensor and he was about to call a computer.
Airman Yeah I figured that as well but it might get you home from 10 buck 2 if you just knew where to look. It would be a sure bet to take the relay out and put a jumper from pin 30 to 87. I guess we should all keep spare relays and fuses. I do keep fuses but not relays. I don't take any road trips without my diagnostic bag of jumpers, multimeter, pliers, test light, crimps, crimpers, screwdrivers, scan tools and I keep safety pins for back probing on me every day. I guess we never think about one relay shutting down the entire system to where nothing works not even a scan tool. The fuse could do the same thing. I just hate for something simple to make me call a wrecker you know. Its complicated but less complicated after watching scanner danner solve this issue. I have a jumper made up for relays with a circuit breaker and a loop large enough to measure current with my AC/DC amp clamp.
I went to a trade high school for automotive and the way you teach and allow students to tag along as you diagnosis is awesome! That's invaluable. I wish my teachers would have done this.
One of the first diagnostics on a blower motor, I learned the hard way used my power probe, had 12v still blower wouldn't turn on (unplugged no load) finally used test light would not light despite showing 12v found bad wire in firewall plug
Coming from a different technical background being civil engineering I am always fascinated with electronics and how things work. I find your videos very educational and inspiring as it teaches non electrical guys like myself how to tackle a problem by just applying basic knowledge together with technical data to trace and rectify the problem. Thanks as well for explaining why relays need to be check loaded rather than just pull it and looking for voltage. Finally you also taught me that not having a 5 volts reference is a clear indication that something is wrong along the circuit and a bad sensor can cause potential problems by pulling down the whole system causing a no start problem. Oh one more thing checking your fuses and relay once you have 5 volts reference is a key piece of information to ensure the circuit is functioning as expected. Great video and thanks again for teaching us how to analyze and fix potential problems with no start issues.
Absolutely helpful paul. I have just worked on the 5.7 liter 3UR-FE engine of a toyota tundra and it turns out that the computer isn't "alive and talking" anymore. This video has given me so much encouragement to get things moving as far as direction is concerned. Besides, I live in the capital city of Nigeria where auto diagnostics is still much like space travel.
My brain leaks knowledge like a sieve - this was a great refresher for me to plug some of the leaks, LOL. Love how you film the path towards the problem - gets the brain working! Amazing how fast I forget stuff now. I forget the meaning of certain automotive acronyms all the time too. Thank God for search engines, lol! Don't get old, kids! :D I'm in the middle of tearing down an old section of my barn to break ground for a new section (that will be my new shop!), so I've taken a couple weeks off, so to speak - if I'm not tinkering with cars every day, what I've learned just seems to go away FAST. This is just telling me that I need to watch your videos EVERY day, and not just when you post new ones! :) I need more hours in a day ... Gotta love FoMoCo power steering pumps - they've made that same noise for DECADES! That one may have been low on fluid, but still ...
The common heard of dealer techs would have thrown thousands of dollars in parts towards that. Problem solvers are rare but highly sought after. GREAT JOB!
Great video. Hope those students realize how lucky they are too have someone with your skill set / knowledge teaching them. A lot of people learn from someone who would have changed coil packs😁.
On the switch side of relay contact was bad (corrosion, burnt contact, created a high resistance in reference circuit taking voltage away from reference voltage, which stopped communication with car computer creating an engine no start. That’s my take away from this video. I think that’s what I observed. Thanks for taking the the time and effort in becoming one of the top dogs in your vocation and sharing your exceptional skills and knowledge with students and public, it is appreciated and noticed. You sir are a Great American.
Thank you sir! And you were close. Correct on the relay part, but it was low or no power to the PCM (as well as other circuits) that prevented the PCM 5v supply from being sent out to its sensors. In other words the relay circuit itself, was not part of the 5v reference circuit directly. Hope that makes sense.
It's nice to come back across this video again. I've got a nissan maxima at the house (sent from a shop) right now that is a no start. One of the first few steps I took was to check for 5v reference and found low voltage on them. This week I should be able to finish up the diagnosis, easily, because of the videos you have put out like this.
AH HaH!!! That was fantastic. Identifying that the jumpered relay at the end was interfering with theft control was masterful. Pure professionalism as they would have said at Wyo tech 30 years ago.
You are an extraordinary electrical maestro.. even though I didn't fully understand your speech, I still learned something from your actual video sir..
scanner danner your vid and how you showed your students what to look for ,how you exsplained thing was over the top great teaching .i wish my teachers had done it like you it would of saved me alot ,money and stress you are the man thanks for this vid keep doing what your doing you have a gift
Nice video. As for charging customers for diagnostics, the shops I have have worked at: general diagnostics 1 hr; no start diagnostics 1.5 hrs. After expiration of these time(s) and result no found, call customer and get authorization for more time. No authorization; no more diagnosis.
Hey just a suggestion... when you get really one off situations like this (relay works, but can't carry it's load) maybe you should keep the broken part for demonstrations later. granted with the videos you have a good document of it, it might be cool to have some examples to give your students some hands on with.
Good Diagnostics! Several times before I retired other (fleet) shops would send me no starts and the 5 volt ref would be low. Older Dodge Vans would lose the 5 volt ref, but the ref was used for something inside the van, I think it was the air bag clock spring. I remember changing a few of those and the 5 volt ref came back. I know later vehicles now use multiple 5 volt ref, which is helpful to eliminate total 5 volt ref problems. Glad to see the students had a chance to see what "the real world sees" when diagnosing a problem. Plus you explain details about why you knew once the relay was changed, the 5 volt ref came back, other than the "million dollar bet!" That was funny!
Possibly the best automotive vid I've seen on UA-cam. Absolutely fantastic! Thank you so much, Scannerdanner for uploading these videos. Very, VERY appreciated. Thanks from N/W Scotland.
Just thought of another good question that will help everyone out.. How do you charge for diagnostics is it by the hour? What if you can't find the problem 100% but can point them in the right direction? Do you still charge for your time ( it seems like it would be difficult), Do they pay you after they put the part on and verify its fixed or pay you before? It's not like you can wait till they install the part to get paid can you? Thanks again hopes this clears things up
Question 1: Flat fee for the first hour (additional time rarely needed but if it is, I charge time involved) Question 2: If I accept the job, there is no such think as "can't". I may need to step away from a problem car for a day but I'll get it, when I come back. And I bill those accordingly Question 3: Paid up front, the day of the diagnosis. The key is having an established relationship with these garages. No one is 100% all the time. I don't care who you are. Upper 97-98% is the goal. That's 2 or 3 miscalls out of 100. But, when you offer your service for the first time to a new garage, there is ZERO room for error. If you get your first one wrong, they won't be calling you back.
Wow, Scan!! That was an exciting video!! I was guessing the whole time!! And just as neat, the problem showed up with the school kids in tow!! Ahhh, I mean, with your students accompanying you!! ;-) Now, for some foolishness! This time, we had a Dan on video!! Along with a James, only prettier!! The scanner wasn't much help, so you will have to change your UA-cam handle to: WIRINGDIAGRAMDANNER!! (Sorry, but "Eric the car guy" was used already.) This time, none of your students floated an air biscuit at ya!!! I'm impressed!! I have a hard time getting all the way thru an awesome instructional video with a fart. Or two!! If they complain about how much you charged for the ignition misfire diagnosis, you can explain it this way!! "I only charged $1 dollar to plug in the ignition coil!! I charged (what ever your basic hourly charge is, minus one dollar) the other amount to know how to find the correct ignition coil to plug in!! Give all of the students a big high five, for being studious and professional, and a big hug for not squeezing cheese on camera!!
Electrical diagnostics is fast becoming my hobby and my favourite job when at work i love the challenge and the buzz of fixing Electrical faults when others have failed. I was just struggling to find where the switching power comes from. Maybe ign main circuits relay? Fantastic video and a pleasure to learn from you. One of my many YT channels i learn from thank you
Paul Excellent video. I'm re-doing my Indiana Certified Emissions Repair Technician Course last night. I completed the course in 2009. A lot has changed since. Concentrating on non- communication issues and reprogramming and flashing modules. Perfect timing with this video. Was hoping to see the theft issue to being the next issue and you going threw and reprogramming 2 keys as that is what ford wants to happen for the theft issue. I understand why you didn't have to do it. You and Eric O. Need to have a meet up so I can pack my bags from Indiana. You bet your butt I'm going to join the premium channel at the end of this month. Later Brother
If you want to learn a whole lot about analog electronic and diagrams this is the best book for it. Radio shack is out of business but you can still get it on amazon used. www.amazon.com/RadioShack-Communications-Electronics-Electronic-Communication/dp/B000NK9YIQ It is not specifically about auto electronics, but it give you a solid understanding about analog circuits (which is what all sensors are in cars). I started building projects and designing my own circuits when I was 10 using this book and I still reference it on a regular basis.
I compliment you on your teaching. It would a help to teach your students that using a fully charged battery or an external supply when trouble shooting electrics. A low voltage high internal resistance battery can waste diagnosis time, & lead to incorrect conclusions. In this case it didn't matter, but in other cases it could. I love the way you demonstrated an initial series of tests without the help of a diagram. Well done !
GREAT VIDEO PAUL. I WAS NEVER AWARE OF THE 5 VOLT REF. TIL 2 YEARS AGO,WHEN I JOINED YOUR ONLINE CLASS. YOU ARE THE MAN. THANK YOU FOR ALL YOUR TIME IT TAKES TO PUT OUT YOUR VIDEOS. AWSOME JOD MR DANNER. THANK YOU
I watched all the free videos for quit a while. Then i bought his e book. then went premium. I watched videos daily like 3 or 4 a day. This stuff is awesome. If u work on cars you should invest.
I actually had a voltage supply relay doing the "exact" same thing on a 2006 a6 last month and I fumbled about before I found the relay was bad. Wish I had watched this video. Learning a lot from these scanner scanner videos
Great video. Practical and efficient. I had a box truck at my shop that kept running when the key was turned off and removed. I ended up finding the AC relay control circuit within the relay shorted. The short prevented a voltage drop within the control circuit of the relay. The lack of voltage drop caused battery voltage to feed into the ignition run circuit of the PCM. New AC relay corrected this symptom.
Just now watching this. Color me impressed! Among jobs I had were a nuke plant mechanical supervisor and certified auto mechanic. Retired, I still work on vehicles. This segment on the 5 V Ref. signal has taught me a lot about it! But, I didn't know of it previously being 9 V. I basically started w/ an '81 Cadillac w/ the infamous 6.0 L V8-6-4 MD-Modulated Dusplacement engine. It was 5 V. The 1st DFI-Digital Fuel Injection. You could get sensor info from the ECC-Electronic Climate Control Head (electronic HVAC control) -TPS, ECT, MAT, MAP, BARO, ACT, O2 and closed or open loop. Most don't know that even USB is 5 V. Cell phones are 3.3V. Cascading voltages. 120v wall outlet "transformed down" to 5v USB to 3.3v cell battery. Where I am going w/ this is that ALL voltages must be on spec. The 🔥 points in the relay caused a low voltage to the Ref. circuit. The PCM not getting the correct voltage resulted in the no-start. As far as charging 1 hr diagnostic time, in this case BOTH time and tools bought are money. And more tools as they redesign vehicles. And more training. Same thing w/ the coil, but, it can also be worth it to not charge-gaining a regular customer-especially if you also point out the coolant leak, which you gain as additional work. This, as long as the customer doesn't abuse you. And finally. Your repertorie w/ your students is amazing! Mike Rowe would be proud!
Yeah i did the premium channel for two years and because of the training my career just took a major turn for the better. Such a small price to pay for the depth of knowledge. I would have paid alot more knowing what i know now.
you are an amazing teacher. never taken the course but when I get some room on my CC I will be buying your book. great material and presented so clearly. you've even saved me money fixing sensor problems on my ol 94 gmc. 600K kms and still going thanks to guys like you.
Not gonna lie, when the kid pointed out the fuse box was marked I cracked up laughing. Hahaha. Awesome video, great work on being descriptive. You apologized a few times but seems as if everything was documented great. Very understandable. Great work, and thank you for this kind of stuff. Really helps out people like me that don't have access to a whole lot of resources in rural areas.
This is sooo cool that you not only find the problem but also have students with you to share with them exactly what and why you need to check out the different possibilities !!
Pretty awesome letting your students along because they actually want to take every opportunity to learn more about diagnostic work. Your the man Dan!!
one of your students asked you at 42:03 if it was your tool causing the problem, you said no, any way at the end of the vid, which was very good, I think he should have got an, that aboy good catch. Good stuff thanks for all your hard work
Scanner Danner! you, my friend, have got to be on par with the legendary heroes of mythical lore. Patience, commitment, Knowledge, and perseverance. The legendary heroes rose up and fought the evil that arose without any unusual majic, mythical blade, nor enchanted helmet. The stories evolved into legend. I encourage one of your students to begin writing the story of "Danner The Great", master of scanner and probe. Read on and follow the most heroic suppressor of ignorance this world has ever known. Hana ho! Hana ho!
That was so Good Dan. Shed so much light on Fault finding One O One, Understanding that wiring diagrams are a must. Here in Australia It is not always so easy to get them on different makes and models. Understanding the 5 Volt reference, looking for an over load by disconnecting sensors etc. Very impressed mate. Keep up the good Work. I have used you for a lot of Diagnostic jobs for years. Cheers Dave from Australia
Thank you David! You should know that my name is Paul and my last name is Danner. :-) It's okay though bro, I get "Dan" all the time Figured since you've been watching for awhile, you'd want to know my name
Thanks mate, I saw a Couple others responded with Paul, But wasnt sure LOL I ran my own Auto business for thirty four years. And every day is a learning day :) I Have passed your name onto a lot of our tradies here in Australia. plus My Auto apprentice s. I hope you dont mind i used a lot of your Teaching Methods as i always Find When teaching, drawing out and Practically Showing students Helps them greatly to understand. Far from what and How my Trade Teachers taught me back in the seventies. keep up the great work mate, Good Trades Men are hard to Find :)
Good group of guys there, didn't run off after class, and stuck around for a confusing diagnostic. That's what I like to see, and I like how you explain how components work. I Just subscribed, after watching several videos. Most of it is way above my head, and I couldn't catch it with a ball glove {Canadian term for I don't get it}. But I learn more with each video.
hi scanner, i am from the GAMBIA, west AFRICA. I HAVE UNDERGONE two years training at certificate level. i have learn a lot from your videos most importantly how to diagnose some problems with just a test light and a multimeter
Paul..i like those final comments on what you should do or not do... Ive just purchased an £1800 scan tool here in the uk...if i have to use it..they have to pay...no free diagnosis...
Thank you for the video! Assessing the diagnosis is difficult, just as it is impossible to 100% estimate the time to search for the root cause! Completely agree with you colleague! Unfortunately, not everyone understands this...
Excellent Video, sometimes contacts on a relay will burn or overheat when the coil of the relay shorts out. For example if the coil shorts internally and you end up “losing “ say one third of the turns in the coil, the relay contacts may close sluggishly and hold in with less than normal force. Over time this will cause high resistance across the contacts and you will see the type of failure you have in the video. This can be proven by testing the current draw of the relay coil and comparing it with the draw of a known good relay. Of course there are other reasons (mechanical, poor material/manufacturing, over-loading etc) that may cause a relay to fail. I always like to know if possible the root cause of component failure so thought I would throw this out there at the risk of sounding a little long winded! Love the video, good stuff!
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I'm your student from Haiti.and I enjoy watching your videos carefully,plus every words will come out of your mouth are from a good pro and teacher.and i feel so great when im watching you teacher
Thank you! 😃
Most shops today just keep replacing parts until they find the problem. You sir are a true troubleshooter. Great video.
those shops do not have true "diagnostic" technicians that solve problems instead of applying a band-aid. True diag tech find employment where they are compensated for their knowledge and finely tuned skillset.
Amazing. You are single-handedly creating an army of automotive diagnosticians. Imagine what the world would be like if every single person was able to find their life's true calling like you have, Paul. You are truly a gift from God to the rest of humanity.
Man, that is quite the compliment. In my knowledge of our Creator, and to keep my pride at bay, I will say this:
I can do all things through Christ who strengthens me.
Just finished a crank no start on a Toyota Tacoma 2003 with a 2.7l engine. No communication with my scanner. So I Dannered the vehicle. Check for 5 volt ref and found low voltage. Checked tail relay and it was defective. Replaced and problem fixed. Another one bites the dust. I learned this from the man .Paul Danner and his awesome teachings. Thank you once again . Jose from Puerto Rico. Scanner Danner Premium is a must.
Man this is awesome feedback, thank you so much!
a relay for tail lights ??
Need more explanation on how you go to the relay switch. Did you just check all fuses and got lucky on the bad relay and fixed it?
So are you telling me that a taillight relay left the owner walking? And this was a Toyota?
I love it when you have your students around asking questions and you address them on the video since it's kind of like they're representing all of us less experienced guys and they're asking questions we would ask. I hope you do more like this...
Thanks for the videos!
Absolutely and thank you!
Don’t think mr danner fools about, even the fact you teach your experience online, have a few students standing at your shoulder with the odd comment of curiosity, you just roll with your diagnoses, it’s great to watch and even you have pride to double check what you say is honesty , to many people out there go for the quick change ( every part scenario till it’s starts ££££$$$$$) keep up the the great work👍🏻 the world is watching a master 👍🏻 keep on rolling sir , all the best from the uk 🇬🇧
N9fdj
How dd😅😮😊7😮r😅ug😅in km🎉
I have been a mechanic off and on for the past 23 years. Electrical diagnostics has always been my weakest link, yet just watching this video alone has made so much sense that I can't believe I didn't "get it" beforehand. I am acutally contemplating looking into your online courses because I can obviously learn really well from your teaching methods. I want to thank you for the time and effort you put into your work, and you have every right to be very proud of any mechanics/technicians that you put out there in the workplace. Again, thank you.
Thank you so much Stefan! Look forward to hearing from you in the comments should you decide to join www.scannerdanner.com/join-scannerdanner-premium.html
4 am . Online just to watch SD. It's not the camera It's the content that's great. Thanks again SD.
What a valuable lesson! Checking 5 volt reference has saved me alot of time. Never trust a relay that clicks. Someone replaced a lot of parts because of a bad relay. 30 years in the business and I'm still learning new techniques. Great video Paul. Thanks for sharing.
This is a perfect example of real world symptom and diagnosis . The fact that you stopped after repairing initial complaint shows that you are a money making machine .
Great video that can show what ALL auto shops need to do .
Scanner Danner is such a good mechanic its scary
nice work
Great video Paul. What the consumer DOES NOT understand is the fact that the Tech/mechanic needs both the TRAINING and TOOLS in order to do a proper diagnosis. You can't have one without the other. Training and Tools cost money, you NEED to recoup your money or you will not be in business for very long. This is why you/we charge what we do. Yes, it took me 5 minutes to find the problem, but I did find the problem. No PARTS cannon was used. Keep up the good fight.
Hello from England. I'm a newbie to your channel and I like what I see. Your a brilliant teacher! and I find myself glued to the computer whilst watching you diagnose none starters like the car in this video. Im not a mechanic, just an old bloke with old school interests in mechanics. Keep up the great work, Im hooked. :-)
Thank you Paul!
This was actually "premium" material. Good job Danner.
Thanks man. It was going to be too but you guys have been waiting for awhile and we are still about 12 days away from getting ScannerDanner Premium moved to my website. And I was certainly not uploading anything more to ScannerDanner Premium on UA-cam.
I hear you, I wouldn't trust UA-cam anymore either.
You are truly an awsome teacher. Classroom learning is great, but real world application of that knowledge is invaluable.
I would love to be your student when you are troubleshooting! This is exactly how good mechanics are made. Using your head and truly understanding what is happening with components one by one and ruling out unnecessary tracing, saving time, which in turn makes you more money! I’m glad I found your videos bcuz I live for this stuff, thank you!
Separate problem, separate diagnostic.....so many people do not understand this point. Car was a "no start" problerm...It now starts. Great diagnostice routine video, well done! and I thought as I watched "wish he would have disassembled theat relay"....BOOM bonus footage, excellent. "Never trust a relay that clicks"..all techs should put that on page one of their notes.
A TON OF VALUABLE INFORMATION IN THIS VIDEO. PAY ATTENTION TO SCANNERDANNER, HE'S NOT GIVING US B.S.
Tail end of the video, you hit the nail on the head!! How much money have we techs spent on the tools needed to get the job done!! So we not only need the education but without the tools nothing can be fix!
i really enjoy electrical problems. i can hear the excitement in your voice as you are "on the hunt". makes it very exciting for your students. i use a primitive way of checking load and control side of relays....i use jumpers that allow me to check voltage, ground and load amps...same result just with a home made jumper...sever pins sizes also. great video. really enjoyable. loved hearing the students getting involved and thinking through it!
Weird that this video just dropped into my phone's playlist. I have a customer with a 2007 Mitsubishi Outlander with the exact same problem ... no comm, no crank, no start, no 5V reference, cooling fans on with 12 VDC going into the MFI relay, and 1.98 VDC coming out (circuit under load). The output from the relay sends power to four fuses (PCM, fuel injectors, ignition coils, sensors). I think I found the problem. Great video Paul!
Thank you!
Paul, on this 2007 Outlander, the 5 v reference appears to be 12 volts. After the MFI relay power flows to a 20 amp fuse; from there, power flows to the O2 sensors, IAC, Evap Purge solenoid, injector relay, and back to the PCM. Do some cars use 12 volts instead of 5? I don't see a "5 v ref" line in the schematic.
@@superk4562 where are you testing the ref circuit? Unplug your ECT and measure there (must be unplugged)
Or on your TPS or MAP (those can be left plugged in or unplugged
@@ScannerDanner I was testing at the MAP (back-probing while plugged in). No voltage on any wire.
@@superk4562 you said it was 12v on the ref circuit??
I love it when a customer gets the bill and says you just replaced a relay! Like when I charge for an EVAP test (I charge a test fee for machine plus labor to inspect and repair) and they say you just replaced a gas cap! They have no idea what it costs to run a full service automotive shop. We need to be paid.
And your knowledge
@@Re-tirados yes equipment and time and most of all your knowledge and the expense and time it takes from your life ( although it is a passion for learning and fixing things that not everyone can fix that runs in your veins) you need to be compensated for it.
When you get top dollar for you expertise then it makes it all worth your while.
the job wont be quick f u havent study for years..that shud be paid.
This has been one of the best vids yet Scanner! Of course all of them are a cut above spectacular.
I couldn't help but think of sanding the points when I saw those dirty contacts in that relay. Todays generation may not know what points are but back in the day now and then you had to sand the points to get going again.
I had an old boat like that once and I had to sand the points to get back in darn near ever time I took it to the lake. The happiest 2 days in my life was the day I bought it and the day I sold it.
I bet if someone just knew where to look, sanding those contacts in that relay would have gotten it going again at least temporarily.
Blade cleaning the carbon off the contacts may not work most of the times cause what broke exactly is the latch coil, i am pretty sure its gonna have way less resistance than normal when this happens, the magnetic field ain't strong enough to support the bridge
My favorite video is the one where they had that chevy impala, i think, with the crank sensor code and it was a short in the wiring harness goin to the cam sensor and he was about to call a computer.
Airman Yeah I figured that as well but it might get you home from 10 buck 2 if you just knew where to look. It would be a sure bet to take the relay out and put a jumper from pin 30 to 87.
I guess we should all keep spare relays and fuses.
I do keep fuses but not relays. I don't take any road trips without my diagnostic bag of jumpers, multimeter, pliers, test light, crimps, crimpers, screwdrivers, scan tools and I keep safety pins for back probing on me every day.
I guess we never think about one relay shutting down the entire system to where nothing works not even a scan tool. The fuse could do the same thing. I just hate for something simple to make me call a wrecker you know.
Its complicated but less complicated after watching scanner danner solve this issue.
I have a jumper made up for relays with a circuit breaker and a loop large enough to measure current with my AC/DC amp clamp.
Great job sir! I was looking at the faces of your students behind you soaking up your knowledge...Priceless :)
true
I went to a trade high school for automotive and the way you teach and allow students to tag along as you diagnosis is awesome! That's invaluable. I wish my teachers would have done this.
One of the first diagnostics on a blower motor, I learned the hard way used my power probe, had 12v still blower wouldn't turn on (unplugged no load) finally used test light would not light despite showing 12v found bad wire in firewall plug
Coming from a different technical background being civil engineering I am always fascinated with electronics and how things work. I find your videos very educational and inspiring as it teaches non electrical guys like myself how to tackle a problem by just applying basic knowledge together with technical data to trace and rectify the problem. Thanks as well for explaining why relays need to be check loaded rather than just pull it and looking for voltage. Finally you also taught me that not having a 5 volts reference is a clear indication that something is wrong along the circuit and a bad sensor can cause potential problems by pulling down the whole system causing a no start problem. Oh one more thing checking your fuses and relay once you have 5 volts reference is a key piece of information to ensure the circuit is functioning as expected. Great video and thanks again for teaching us how to analyze and fix potential problems with no start issues.
solid diag. just bought a old school vantage. love that yours is still around and kicking / working
I have one too, even have the KV module for it
Me too. Enjoy using it
Absolutely helpful paul. I have just worked on the 5.7 liter 3UR-FE engine of a toyota tundra and it turns out that the computer isn't "alive and talking" anymore. This video has given me so much encouragement to get things moving as far as direction is concerned. Besides, I live in the capital city of Nigeria where auto diagnostics is still much like space travel.
My brain leaks knowledge like a sieve - this was a great refresher for me to plug some of the leaks, LOL. Love how you film the path towards the problem - gets the brain working!
Amazing how fast I forget stuff now. I forget the meaning of certain automotive acronyms all the time too. Thank God for search engines, lol! Don't get old, kids! :D
I'm in the middle of tearing down an old section of my barn to break ground for a new section (that will be my new shop!), so I've taken a couple weeks off, so to speak - if I'm not tinkering with cars every day, what I've learned just seems to go away FAST. This is just telling me that I need to watch your videos EVERY day, and not just when you post new ones! :)
I need more hours in a day ...
Gotta love FoMoCo power steering pumps - they've made that same noise for DECADES! That one may have been low on fluid, but still ...
The common heard of dealer techs would have thrown thousands of dollars in parts towards that. Problem solvers are rare but highly sought after. GREAT JOB!
Great video. Hope those students realize how lucky they are too have someone with your skill set / knowledge teaching them. A lot of people learn from someone who would have changed coil packs😁.
On the switch side of relay contact was bad (corrosion, burnt contact, created a high resistance in reference circuit taking voltage away from reference voltage, which stopped communication with car computer creating an engine no start. That’s my take away from this video. I think that’s what I observed. Thanks for taking the the time and effort in becoming one of the top dogs in your vocation and sharing your exceptional skills and knowledge with students and public, it is appreciated and noticed. You sir are a Great American.
Thank you sir! And you were close. Correct on the relay part, but it was low or no power to the PCM (as well as other circuits) that prevented the PCM 5v supply from being sent out to its sensors. In other words the relay circuit itself, was not part of the 5v reference circuit directly. Hope that makes sense.
Thank you , I now realize the defective relay caused the loss of power supply to PCM and related circuits.
@@JackyK555 yes sir! And you're welcome
Great lesson about relays and 5 volt ref! Thanks Paul and your students for your time it is greatly appreciated.
It's nice to come back across this video again. I've got a nissan maxima at the house (sent from a shop) right now that is a no start. One of the first few steps I took was to check for 5v reference and found low voltage on them. This week I should be able to finish up the diagnosis, easily, because of the videos you have put out like this.
Awesome! Thanks Justin
AH HaH!!! That was fantastic. Identifying that the jumpered relay at the end was interfering with theft control was masterful. Pure professionalism as they would have said at Wyo tech 30 years ago.
it was triggering the anti-theft system, because it sees it staying on and that is equal to being "hot wired"
Exactly!
You are an extraordinary electrical maestro.. even though I didn't fully understand your speech, I still learned something from your actual video sir..
Another awesome video! Thanks for bringing this to us, Paul! I, too, like having your students there asking questions...it really helps.
johnaclark1 The students did really help especially the question about if its possible the low battery voltage affect 5 volt reference.
I was wondering about the 5v reference for a wile too.
Now I know why😊
scanner danner your vid and how you showed your students what to look for ,how you exsplained thing was over the top great teaching .i wish my teachers had done it like you it would of saved me alot ,money and stress you are the man thanks for this vid keep doing what your doing you have a gift
Exellent video, I have learned a lot with your videos, thanks for sharing your knowledge with us,
take care and blessings for you and your family,
Nice video. As for charging customers for diagnostics, the shops I have have worked at: general diagnostics 1 hr; no start diagnostics 1.5 hrs. After expiration of these time(s) and result no found, call customer and get authorization for more time. No authorization; no more diagnosis.
exactly, and for the time spent, you tell them what is NOT wrong with the car
Hey just a suggestion... when you get really one off situations like this (relay works, but can't carry it's load) maybe you should keep the broken part for demonstrations later. granted with the videos you have a good document of it, it might be cool to have some examples to give your students some hands on with.
The fact that the relay is broken is irrelevant. Why? Because it's the McGuffin to make the video. The relay is probably fine.
decent idea
Good Diagnostics! Several times before I retired other (fleet) shops would send me no starts and the 5 volt ref would be low. Older Dodge Vans would lose the 5 volt ref, but the ref was used for something inside the van, I think it was the air bag clock spring. I remember changing a few of those and the 5 volt ref came back. I know later vehicles now use multiple 5 volt ref, which is helpful to eliminate total 5 volt ref problems. Glad to see the students had a chance to see what "the real world sees" when diagnosing a problem. Plus you explain details about why you knew once the relay was changed, the 5 volt ref came back, other than the "million dollar bet!" That was funny!
thank you Mr. Paul i really appreciate your effort to teach people, i have learned a lot from you, again thanks a lot
The troubleshooting process in this video is great! Basic principles + logic = car fixed. Greetings from Romania!
That's why I juggle relays on my Major's first, Don't get me twisted I learned from my competition diagnostic work how to teach my apprentices.
moving relays around almost never is the fix, plus I prefer to prove the fault without switching parts :-)
Possibly the best automotive vid I've seen on UA-cam. Absolutely fantastic!
Thank you so much, Scannerdanner for uploading these videos. Very, VERY appreciated.
Thanks from N/W Scotland.
Thanks man!
Just thought of another good question that will help everyone out.. How do you charge for diagnostics is it by the hour? What if you can't find the problem 100% but can point them in the right direction? Do you still charge for your time ( it seems like it would be difficult), Do they pay you after they put the part on and verify its fixed or pay you before? It's not like you can wait till they install the part to get paid can you? Thanks again hopes this clears things up
Question 1: Flat fee for the first hour (additional time rarely needed but if it is, I charge time involved)
Question 2: If I accept the job, there is no such think as "can't". I may need to step away from a problem car for a day but I'll get it, when I come back. And I bill those accordingly
Question 3: Paid up front, the day of the diagnosis.
The key is having an established relationship with these garages. No one is 100% all the time. I don't care who you are. Upper 97-98% is the goal. That's 2 or 3 miscalls out of 100.
But, when you offer your service for the first time to a new garage, there is ZERO room for error. If you get your first one wrong, they won't be calling you back.
I started this in 1988 from VCRs, into power, Genset controllers, motor controllers etc, but still learnt something from this video!
Wow, Scan!! That was an exciting video!! I was guessing the whole time!! And just as neat, the problem showed up with the school kids in tow!! Ahhh, I mean, with your students accompanying you!! ;-)
Now, for some foolishness!
This time, we had a Dan on video!! Along with a James, only prettier!!
The scanner wasn't much help, so you will have to change your UA-cam handle to:
WIRINGDIAGRAMDANNER!! (Sorry, but "Eric the car guy" was used already.)
This time, none of your students floated an air biscuit at ya!!! I'm impressed!! I have a hard time getting all the way thru an awesome instructional video with a fart. Or two!!
If they complain about how much you charged for the ignition misfire diagnosis, you can explain it this way!!
"I only charged $1 dollar to plug in the ignition coil!! I charged (what ever your basic hourly charge is, minus one dollar) the other amount to know how to find the correct ignition coil to plug in!!
Give all of the students a big high five, for being studious and professional, and a big hug for not squeezing cheese on camera!!
Electrical diagnostics is fast becoming my hobby and my favourite job when at work i love the challenge and the buzz of fixing Electrical faults when others have failed. I was just struggling to find where the switching power comes from. Maybe ign main circuits relay? Fantastic video and a pleasure to learn from you. One of my many YT channels i learn from thank you
Hope James bought the first round after that t-pin incident! Let us never speak of it again. 😉
haha nice
Well, they got it back.
@@arielatom03 .
Paul
Excellent video. I'm re-doing my Indiana Certified Emissions Repair Technician Course last night. I completed the course in 2009. A lot has changed since. Concentrating on non- communication issues and reprogramming and flashing modules. Perfect timing with this video. Was hoping to see the theft issue to being the next issue and you going threw and reprogramming 2 keys as that is what ford wants to happen for the theft issue. I understand why you didn't have to do it. You and Eric O. Need to have a meet up so I can pack my bags from Indiana. You bet your butt I'm going to join the premium channel at the end of this month. Later Brother
Thanks so much!
Nice job i do mechanics too but schematics not easy to read but i can read it
Thank you
Deo Nandkumar look for Jorge Menchus article on reading diagrams
Post the link Keith. It will go to spam but I'll unlock it.
www.garrard.k12.ky.us/userfiles/indexblue/2_2.pdf - Great Article
If you want to learn a whole lot about analog electronic and diagrams this is the best book for it. Radio shack is out of business but you can still get it on amazon used. www.amazon.com/RadioShack-Communications-Electronics-Electronic-Communication/dp/B000NK9YIQ It is not specifically about auto electronics, but it give you a solid understanding about analog circuits (which is what all sensors are in cars). I started building projects and designing my own circuits when I was 10 using this book and I still reference it on a regular basis.
I compliment you on your teaching. It would a help to teach your students that using a fully charged battery or an external supply when trouble shooting electrics. A low voltage high internal resistance battery can waste diagnosis time, & lead to incorrect conclusions. In this case it didn't matter, but in other cases it could.
I love the way you demonstrated an initial series of tests without the help of a diagram. Well done !
Damn to all Fords!
You miss-spelled Chevy!
+Just2362
HAHA, nice!
GREAT VIDEO PAUL. I WAS NEVER AWARE OF THE 5 VOLT REF. TIL 2 YEARS AGO,WHEN I JOINED YOUR ONLINE CLASS. YOU ARE THE MAN. THANK YOU FOR ALL YOUR TIME IT TAKES TO PUT OUT YOUR VIDEOS. AWSOME JOD MR DANNER. THANK YOU
David Cote lol me too the 5v
Sweet
It's always inspiring watching your teaching and troubleshooting techniques.
Awesome! To inspire others makes me feel good inside 🙂
Thank you for sharing that
ahh back in the day we would just sand the contacts
Seat of the pants content, very watchable and informative. I see lots of cars where "somebody" got there before me. Great practical demonstration.
Thank you!
A lot of Info teaching dude..I don't have the tools to test ,just a few but I learn from just watching and listening.
I watched all the free videos for quit a while. Then i bought his e book. then went premium. I watched videos daily like 3 or 4 a day. This stuff is awesome. If u work on cars you should invest.
I actually had a voltage supply relay doing the "exact" same thing on a 2006 a6 last month and I fumbled about before I found the relay was bad. Wish I had watched this video. Learning a lot from these scanner scanner videos
Great video. Practical and efficient. I had a box truck at my shop that kept running when the key was turned off and removed. I ended up finding the AC relay control circuit within the relay shorted. The short prevented a voltage drop within the control circuit of the relay. The lack of voltage drop caused battery voltage to feed into the ignition run circuit of the PCM. New AC relay corrected this symptom.
Just now watching this. Color me impressed! Among jobs I had were a nuke plant mechanical supervisor and certified auto mechanic. Retired, I still work on vehicles.
This segment on the 5 V Ref. signal has taught me a lot about it! But, I didn't know of it previously being 9 V. I basically started w/ an '81 Cadillac w/ the infamous 6.0 L V8-6-4 MD-Modulated Dusplacement engine. It was 5 V. The 1st DFI-Digital Fuel Injection. You could get sensor info from the ECC-Electronic Climate Control Head (electronic HVAC control) -TPS, ECT, MAT, MAP, BARO, ACT, O2 and closed or open loop.
Most don't know that even USB is 5 V. Cell phones are 3.3V. Cascading voltages. 120v wall outlet "transformed down" to 5v USB to 3.3v cell battery.
Where I am going w/ this is that ALL voltages must be on spec.
The 🔥 points in the relay caused a low voltage to the Ref. circuit. The PCM not getting the correct voltage resulted in the no-start.
As far as charging 1 hr diagnostic time, in this case BOTH time and tools bought are money. And more tools as they redesign vehicles. And more training. Same thing w/ the coil, but, it can also be worth it to not charge-gaining a regular customer-especially if you also point out the coolant leak, which you gain as additional work. This, as long as the customer doesn't abuse you.
And finally. Your repertorie w/ your students is amazing! Mike Rowe would be proud!
Thank you so much!
Yeah i did the premium channel for two years and because of the training my career just took a major turn for the better. Such a small price to pay for the depth of knowledge. I would have paid alot more knowing what i know now.
Thanks so much Mike! Appreciate this comment here.
you are an amazing teacher. never taken the course but when I get some room on my CC I will be buying your book. great material and presented so clearly. you've even saved me money fixing sensor problems on my ol 94 gmc. 600K kms and still going thanks to guys like you.
Nice! Glad to see guys like you putting this stuff to use.
Thanks so much for your kind words
Where can I find your book???
@@david_bmx1148the AESwave store
Not gonna lie, when the kid pointed out the fuse box was marked I cracked up laughing. Hahaha. Awesome video, great work on being descriptive. You apologized a few times but seems as if everything was documented great. Very understandable. Great work, and thank you for this kind of stuff. Really helps out people like me that don't have access to a whole lot of resources in rural areas.
This is the absolutely most elegant diagnosys. Just sensational Scanner Danner.
Sweet display of teaching and an awesome example of why I need to get your book and premium content! Thank you for your wealth of knowledge brother!
This video is very instructive and nothing short of awesome. I'm going to save it to watch over and over. Thanks for your efforts!
This is sooo cool that you not only find the problem but also have students with you to share with them exactly what and why you need to check out the different possibilities !!
Pretty awesome letting your students along because they actually want to take every opportunity to learn more about diagnostic work. Your the man Dan!!
Vehicle Problem: Big Problem
SD: Problem melt like wax
Learning so much, keep it up Champs
Excellent video, so much fun to watch. Next level : "No start, no spark, no fuel, no com, no wiring diagrams". Welcome to my Alfa Milano world hehe.
VERY INTERESTING TEACHER TO LISTEN TO...I WISH TO GET MORE VIDEOS
Hi Paul used these guidelines you use on a Hitachi excavator today to find fault thanks
man, this is what's up right here! These principles apply to EVERYTHING! Thank you for this comment. Made my morning. Sharing this on my FB page now
Scannerdanner u make everything looks easy man
one of your students asked you at 42:03 if it was your tool causing the problem, you said no, any way at the end of the vid, which was very good, I think he should have got an, that aboy good catch. Good stuff thanks for all your hard work
Great job . I'm improving each and every time I watch your videos
Thanks alot am a technician who learnt alot from your channel
Thank you Paul for greats videos in UA-cam ,I learned a lot of you and always like to watch your videos, greetings from Bulgaria!
Love what you're doing. On the spot diagnoses from start to finish with details (and a lesson to boot)! Very much appreciated
Scanner Danner! you, my friend, have got to be on par with the legendary heroes of mythical lore. Patience, commitment, Knowledge, and perseverance. The legendary heroes rose up and fought the evil that arose without any unusual majic, mythical blade, nor enchanted helmet. The stories evolved into legend.
I encourage one of your students to begin writing the story of "Danner The Great", master of scanner and probe. Read on and follow the most heroic suppressor of ignorance this world has ever known.
Hana ho! Hana ho!
Thanks my friend. Loved this comment
That was so Good Dan. Shed so much light on Fault finding One O One, Understanding that wiring diagrams are a must. Here in Australia It is not always so easy to get them on different makes and models. Understanding the 5 Volt reference, looking for an over load by disconnecting sensors etc. Very impressed mate. Keep up the good Work. I have used you for a lot of Diagnostic jobs for years. Cheers Dave from Australia
Thank you David! You should know that my name is Paul and my last name is Danner. :-)
It's okay though bro, I get "Dan" all the time
Figured since you've been watching for awhile, you'd want to know my name
Thanks mate, I saw a Couple others responded with Paul, But wasnt sure LOL I ran my own Auto business for thirty four years. And every day is a learning day :) I Have passed your name onto a lot of our tradies here in Australia. plus My Auto apprentice s. I hope you dont mind i used a lot of your Teaching Methods as i always Find When teaching, drawing out and Practically Showing students Helps them greatly to understand. Far from what and How my Trade Teachers taught me back in the seventies. keep up the great work mate, Good Trades Men are hard to Find :)
Good group of guys there, didn't run off after class, and stuck around for a confusing diagnostic. That's what I like to see, and I like how you explain how components work. I Just subscribed, after watching several videos. Most of it is way above my head, and I couldn't catch it with a ball glove {Canadian term for I don't get it}. But I learn more with each video.
LOL So am I but never heard that term before!
I am an accountant but if you were in my country I would follow a mechanics course with a teacher like you !
You approach it with a logic series of process, you think logically... Excellent.!
hi scanner, i am from the GAMBIA, west AFRICA. I HAVE UNDERGONE two years training at certificate level. i have learn a lot from your videos most importantly how to diagnose some problems with just a test light and a multimeter
I learned a lot from you Sir, Dan your student is so lucky to have you.
Paul..i like those final comments on what you should do or not do...
Ive just purchased an £1800 scan tool here in the uk...if i have to use it..they have to pay...no free diagnosis...
Thank you for the video! Assessing the diagnosis is difficult, just as it is impossible to 100% estimate the time to search for the root cause! Completely agree with you colleague! Unfortunately, not everyone understands this...
I am more excited to see your new videos than any other program on TV or you tube!!! Keep them coming and thanks for the tips :)
Mario Lagoudelis ya me too always get excited when Paul does a big start and doesn't give the answer away 😄
A no start I mean
Me too
Great diagnosis. One of your students did say it was that relay tool .that's why it didn't start.
I think you have done a good job with the video and your teaching abilities
The lettering on the coil fault was real cool. Dead in the water. Now running! Gotta love the Danner!!
Nice work. Please teach and Produce Very good Technicians to the World. We need them.
this section is awesome. i desire to be part of this class in time to come for some reason. i will be glad to have you as my teacher.
Thank you Elijah! Great name btw
Excellent Video, sometimes contacts on a relay will burn or overheat when the coil of the relay shorts out. For example if the coil shorts internally and you end up “losing “ say one third of the turns in the coil, the relay contacts may close sluggishly and hold in with less than normal force. Over time this will cause high resistance across the contacts and you will see the type of failure you have in the video. This can be proven by testing the current draw of the relay coil and comparing it with the draw of a known good relay. Of course there are other reasons (mechanical, poor material/manufacturing, over-loading etc) that may cause a relay to fail. I always like to know if possible the root cause of component failure so thought I would throw this out there at the risk of sounding a little long winded! Love the video, good stuff!