🤨Have you ruled out a wiring fault but you’re still having problems with a module on your vehicle?🤬Click here to get it tested:➡link.ecutesting.com/WPIN
Where do you find those pin wire remover unlocking key tools and the name their known as ? I have Audi Q7 3.6L engine and I'm working on it myself. I also would like to know how do you or can we use our VCDS software to perform the ECU diagnostic test on it if so how do I carry it out step by step thank you.
I own a lexus and bmw. I wish I had bought a good scanner+ software specifically for BMW long time ago. Will make your diy repair so much easier and less guessing
I'm so glad that I found your channel. Please keep making this kinds of videos. The most important and useful information compressed in a 10+ minute videos are just the best. Wish you more subs.
Awesome videos as a novice it's a great feeling knowing there are instructional videos about automotive electricial diagnostics. It's like being in shop class except this time my teacher actually cares about teaching.
Very good video, informative, very easy to comprehend and apply in real life situations. I’ve been doing automotive and diesel repairs for about 15 years now, and was very afraid of electrical up until 2019.. once I just dove in and really broke out the books from tech school, I figured my way around. But after stepping out of the industry for a couple of years, and restarting around 2022, it’s nice to have this easily accessible database of this talented individual’s skill set and have him as a coach whenever you need. We all need to keep up to date with tech, or else who will fix these things? I know I’ve never taken any car I’ve ever owned to a dealership. Videos like this help me out in my personal life, side jobs, and in my career. Will definitely be a supporter, and I’ve subscribed and liked every video I’ve watched so far. Will continue to enlighten myself through your good videos. Thank you very much for making these videos sir you are a very rare breed.
Excellent short video on car wiring testing & repair. One of the best I've seen on the basics of what to look for. I look forward to seeing your other videos. If you haven't done so already, a video on sensor wiring would be a good topic.
I have a N80 short high and closed circuit code on a 2017 jetta. I replaced the valve but no fix, I think this might be my issue, I dont think im gonna be able to fully go into this diagnosis without those special tools. This ones gonna have to be sent to the dealership but im glad you taught me all of this on the exact same car im working on.
Ever come to north dakota don't it's cold and my car has been in a shop for 2 fn months over a dam wire a wire, my mechanic is a ass hole he works on big business vehicles so little old me doesn't matter,having 2 special needs children and spending almost 10 grand on the car and paying fools to charge me 500.00 5 times and stilllllll no car 2 dam months 😢dam sorry for all the negative but it's hard without a car
@@Nicole-dj3jf i'm a fellow american and the reason u have this much trouble finding good mechanics is the nation hs had a severe shortage of truly competent and qualfied such workers. This has a lot to do with our national and state politics over the past forty years, where conservative fought like hell to not allow any educational programs or expansion of such. Idiots!
Hi. We are glad you liked the video! We have a video that touches on how to diagnose a faulty injector here: ua-cam.com/video/jF9atOqq3Mc/v-deo.html, however we do plan on making a more comprehensive guide on ignition coils and injectors at some point in the future!
Bsi unit, potentiometer (throttle pedal) and air mass flow. All 3 continuously showing up on OBD "incoherence fault". apart from BSI the others have been changed for genuine replacements. Vehicle goes into limp mode after a 1/4 mile drive.
you skipped over the critical items. 1. do you disconnect the battery for continuity tests ? 2. how do you know where the far end of the wire you are testing goes (tracing)
Brilliant content as always so thankyou for that. Quick question. Where can you get those drag tool tester kits as i have the pin removal tools but not those and Google doesn't show anything.
Hi. We're glad you enjoyed the video! The drag tools can also be called terminal tension/pin tension tools but they can be hard to come by. Some suppliers sell these specific tools: www.autotechelectrical.com/ but if you are unable to source these, then a good alternative is getting terminal test lead attachments for your multimeter which will do the same job: www.hubitools.com/en/catalog/diagnostic-test-lead-set~0389d3b3-3acb-2bce-9ac0-39eabe1ce34f However these usually come in big kits which makes them fairly expensive. Finally, if those two options aren't for you, you can always buy replacement terminals/pins for your vehicle and use those! Hope that helps.
Hi ECU Testing, I have a 1989 Pontiac Firebird with a high beam indicator problem. When I turn on my headlights, the high beam indicator light stays on continuously. The car will will switch between high and low beams and I've noticed that the indicator shines a little brighter when it's on high beams. I have the service manual and it shows power to the headlights coming through the high/low beam switch with one low beam tan wire going to the low beam element and then to ground on the low beam circuit. The high beam circuit shows a green wire the high beam side of the high/low beam switch and splitting into two green wires on the output of the high/low switch where one green wire appears to go to the high beam element and then to ground while the other green wire goes to directly to the high beam indicator light and then to ground. I've checked the grounds for both headlights and and they appear to be solid with 0 ohms. I've also checked the continuity of the high/low beam switch and it seems to be okay. Do you have any suggestions for finding the ghost voltage feeding my high beam indicator light? Thanks, Robert
My favorite cars to test is the VW Jetta, specifically the ECM connector as they rivet a steel plate over the connector so that you can’t just easily remove it to test the systems :) thanks VW
Hi. If done with good technique, i.e a good strong contact is made and heatshrink is applied, then using crimp sleeves should not create excess resistance in the CAN bus system.
Hi. Yes, if you remove the affected wire's terminals (de-pin) from both connectors then the wire should be isolated from the circuit. Plug both connectors back in and test for continuity between battery ground or battery voltage depending on which you suspect it is shorted to. Hope that makes sense!
@@Ecutestinglimited it does thank you. I was just trying to suss out if you were doing it differently with them still connected. Electrics are not everyone’s friend, especially mine. I came across your videos and enjoyed your explanation and theory. Instant subscriber thank you.
If i wanted to check a coil pack connectors continuity do i have to remove battery terminals before doing so being the connector is still connected to the harness?
Nissan miccra k12 crank, but no start , no ignition coming to the coils . lately. I found that the socket that coming to the ignition coil melted happened twice.
Liked your video straight to the point myself I always use the dynamic voltage drop to get all I need positive side and neg side in all connections to find problems anyway where did you grab your tension key tools love them thanks again sub and liked looking forward to watchig more
Hi. We're glad you enjoyed the video! The terminal tension/pin tension tools can be hard to come by. Some suppliers sell these specific tools: www.autotechelectrical.com/ but if you are unable to source these, then a good alternative is getting terminal test lead attachments for your multimeter which will do the same job: www.hubitools.com/en/catalog/diagnostic-test-lead-set~0389d3b3-3acb-2bce-9ac0-39eabe1ce34f However these usually come in big kits which makes them fairly expensive. Finally, if those two options aren't for you, you can always buy replacement terminals/pins for the specific connector you're testing and use those! Hope that helps.
Hi, very good question! Yes the multimeter will produce a reading even without being directly connected to a negative. This is because in order for current to flow through the wire, the circuit must be complete by being connected to a ground point. While you're not directly touching a ground point with your multimeter probes, the circuit itself is grounded through its connection to the battery's negative terminal or another grounding point. This shared ground ensures that all components in the circuit have a common reference point for electrical potential. By placing one probe at the start of the wire (or one side of the component) and the other probe at the end (or the other side), you're measuring the voltage difference between these two points. This difference is the voltage drop, which occurs due to resistance in the wire or component. The multimeter doesn't need to "know" they share the same ground in an explicit sense; it simply measures the difference in electrical potential between the two points you're testing. In the video, we have shown a simplified wiring diagram only showing the 12v power supply wire to the alternator, whereas for this circuit to be complete there would also be a ground wire going back to battery negative or a ground point on the vehicle (in most alternators this would be the casing of the alternator itself which is attached to the chassis). Hope this helps!
@Ecutestinglimited Of course. Thank you . Great videos by the way .I'm a spark of 30 years myself but working with single and 3 phase AC is a different ball game no where near as technical as ur game ,and I think my knowledge apart from using a multi meter is a hindrance more than a help when it comes to cars.That said I've never understood Canbus until I watched ur video today.and it's very much the same as testing and fault finding a ring main . Thanks again mate
Would you solder a Relay if used in a car? Many places inc google are all for crimping etc, but surely a soldered connection for an immobilser and a relay should all be soldered and then taped up? What is your opinion ?
Depends on location. Solder could break due to heat or vibration. Clamping with proper tools and quality materials will last those elements. Hope that make sense. I did solder wires behind my headlights but that’s away from engine. So it’s still working 3yrs+,
Thank you for the Video I need help with my 1.8 ,3 ,1994 Jetta if I switch on the car it cuts out the electronic coil I replaced 5 coils in a short time please can you help me Sir Thank you
I have problem on my Smart 450. All fuses are good, but when i set my multimetter to diode mode and test between positive and negative terminal i have continuity. Also my alternator is shorting to the ground. Problem manifest in instrument cluster turn on all lights even after key is removed from ignition. Just to mention alternator is charging fine. About 14.3v when car is on
I know this segment is upon wiring. I saw another video of yours which was speaking about codes for example P1254. I would like to know what does code P12A2 I have VCDS software yet nothing in code aspect states what the code is for a 07 Audi Q7 engine 3.6L V6 can you explain to me what that code is and direct me to check it for repair thank you.
Vw passat 2018(142k)i got EPC sign and engine light on. I put the new spark plug, throttle body, ignition coils and also cleaned the fuel injector but still its there. ANY SUGGESTIONS????
Hi. You can get these attachments as part of a multimeter accessory kit from automotive diagnostic equipment suppliers such as Pico Technology: www.picoauto.com/products/clips-and-adaptors/backpinning-probe-set Alternatively, and depending on budget, you can get the needle/pin probes on their own from online retailers like Ebay or Amazon.
Yeah, a wire might seem good but can short or create open loop when moved. Ideally, if your multimeter beeps when shorted, you can try shake the cables and connectors a bit and listen for interrupted beeping.
Hi! My mother bought a 2016 GMC - and turns out to have wiring issues, I'm not too familiar with repairing my own vehicles. She seems to be intimidated by asking local mechanics about the issue. I don't doubt that the cost to have a vehicle wiring fixed or redone would be cheap. This is the first step in diagnosing the issues? She seems to think because of one mechanic that she needs the whole vehicle completely rewired! I question that- even if it did they made it sound like the whole vehicle needs to be gutted and every wire needs replaced. What are my options ? And are my instincts right about these guys?
You can carry out the testing methods highlighted in this video using either an analogue or digital multimeter. However, a digital meter is always preferable as it offers more precision and reliability in results, especially when testing circuits dynamically such as during voltage drop testing. Also keep in mind that with analogue multimeters you will need to select the correct range when carrying out your tests to prevent damage to the multimeter. Hope this helps!
I own a 2005 Ford Taurus. I have a stalling issue that shows no code at all. I feel this may be the problem as I have had tune-ups, replaced fuel filter, MAF and IAF sensor I am baffled. It will start right up, drive fine for awhile then randomly stall. All dash light illuminate still no codes. Could it be ECU? I love this car but it is draining my bank account
morning....have any ideea why my car dosent comunicate with CAN?my vcds says j533no comunicațional with CAN gateway...no comunicate with batery module...and generator...The car îs an a6 c6 year 2010....thank you very much
Hi. We have actually recently completed a video on diagnosing CAN bus faults here: ua-cam.com/video/fZMNzKpCGfc/v-deo.html The video goes over some basic principles of the CAN bus network, however, as your system includes a gateway module, the diagnostic tests at the OBD2 port may not be the same. The fault will likely lie with either the gateway module or the alternator (generator), so you will need to unplug the alternator to see if the fault disappears. If it doesn't, then test the integrity of the communication wires between the two. Finally check the gateway module's power (sometimes fused) and grounds. Hope this helps!
@@Ecutestinglimited hello...i unbluged The alternator wire...and all The erorrs disapear....ca u tell me that u check next?should i duble check The alternator regulator ....install The corect Code ?
That indicates the alternator is faulty. We have done a video on diagnosing faults with the alternator here: ua-cam.com/video/gpFlPU2HQkY/v-deo.html but as you have said, it is likely a fault with the voltage regulator. Depending on the model of alternator you have, the regulator can be replaced without needing to replace the whole alternator, however we would recommend getting this confirmed by a qualified mechanic who can advise you on your specific vehicle.
is there one of these to help urgent electrical professor electrician electric technician my case : ( when i connect the multimeter red to red the + / and black probs ) . gives reading as continuity important notes : 1 - NO BATTERY 2 - multimeter ON Diode mode " continuity" - is that normal - ?!?!?!
I was told a while ago that a lot of modern computer controlled cars have resistive cables ! So I'd assume that if you have to re solder a cable, the pc controller would know this and still flag up a fault ? Apparently.
Modern vehicles can use a variety of cable types, however resistive types are normally for specialised components and the majority of the vehicle's electrical system uses standard copper wiring in which a properly soldered joint shouldn't cause any problems. However, it is always worth consulting your vehicles repair manual or schematic to ensure you are following their guidelines.
Hi,I am Ali from Egypt ,I have car Renault Clio sedan model 2008 1.4 CC 8V ,I have many problem with it and many electric technical in Egypt did not where the problem and when put it on the OBD2scaner it say it no problem in car ?! So please can you help me the problem is in the ideal speed and car stop the car engine sound up and Down and motion too and the RPM to it move up and down but between speed 750 as up and 500 as down and I have another problem in the morning when I start the engine it start quickly without problem when I go to work and in the end of the work day I leave my car under sun in the park when ride it and start the engine the engine lake and did not start immediately it take one 30 second to start up and another problem with windows glass when I up the widows and the windows is closed and if I did not left the glass button the heat indicate is up as the car was very heat I don’t know what the reaction between the widows button and the heat indicator can you help me please
It helps to know the correct reading for the wires you are checking. And. Good luck finding a multimeter w/ wires that long. You’ll have to get the correct readings from factory manual.
Hello, after longtime....😊 Here, 12V Vs 7V... I have one Super CONFUSING VOLTAGES READINGS on door opened or closed status. For example, in i20 2011 India version without LCD display on instrument cluster, the voltage at any door switch is SOLID 12V when door is closed, and immediately drops to SOLID 0V when it is opened. Now, in today's modern car like Toyota Glanza and Toyata Taisor which has LCD display, and for the same situation, when door is closed from opened, the voltage remains at solid 12V, and after about 20 secs, the voltage drops to SOLID 7V. As soon as door is opened, it changes to 0V. Now, when the door is closed again from opened, the voltage immediately rises to SOLID 12V, and stays for about 20 seconds, and then only drops to 7V. Now, why is this voltage drops delaying from 12 to 7?? What's the purpose or significance of this delay in voltage drops? Why not immediately changed to 12V from 0? Why 12V, and then later slowly to 7V???
I forgot to include the fact that when my Taurus stalls and shuts down, it will start right back up like nothing happened. Any input would be welcomed. My car only has 70,873 mi.
🤨Have you ruled out a wiring fault but you’re still having problems with a module on your vehicle?🤬Click here to get it tested:➡link.ecutesting.com/WPIN
Where do you find those pin wire remover unlocking key tools and the name their known as ? I have Audi Q7 3.6L engine and I'm working on it myself. I also would like to know how do you or can we use our VCDS software to perform the ECU diagnostic test on it if so how do I carry it out step by step thank you.
This is the best comment ever
This guy knocked my socks off in Transporter and then again in Transporter 2 and now he is helping me fix my car. What can't this guy do?
😂😂😂
Oh that why he looks familiar 😂😂
Now he's helping me fix my Transporter.
I like him better as The mechanic lol
This guy is awesome.
Been having a massive problem with my bmw x3 and now i know what to do!
cheers from california
I own a lexus and bmw. I wish I had bought a good scanner+ software specifically for BMW long time ago. Will make your diy repair so much easier and less guessing
This guy is the real deal, been doing this stuff for over 40 years, and he's spot on.
I'm so glad that I found your channel. Please keep making this kinds of videos. The most important and useful information compressed in a 10+ minute videos are just the best. Wish you more subs.
Thank you so much! We're glad you are enjoying our channel!
Awesome videos as a novice it's a great feeling knowing there are instructional videos about automotive electricial diagnostics. It's like being in shop class except this time my teacher actually cares about teaching.
Excellent explanation on electrical connectivity faults and corrections. More of the same contents please!
Very good video, informative, very easy to comprehend and apply in real life situations. I’ve been doing automotive and diesel repairs for about 15 years now, and was very afraid of electrical up until 2019.. once I just dove in and really broke out the books from tech school, I figured my way around. But after stepping out of the industry for a couple of years, and restarting around 2022, it’s nice to have this easily accessible database of this talented individual’s skill set and have him as a coach whenever you need. We all need to keep up to date with tech, or else who will fix these things? I know I’ve never taken any car I’ve ever owned to a dealership. Videos like this help me out in my personal life, side jobs, and in my career. Will definitely be a supporter, and I’ve subscribed and liked every video I’ve watched so far. Will continue to enlighten myself through your good videos. Thank you very much for making these videos sir you are a very rare breed.
Excellent channel. Concise explainations without extra chatter. Thanks for taking the time to do these.
Thank you so much! We're glad you like our channel 👍
Excellent short video on car wiring testing & repair. One of the best I've seen on the basics of what to look for. I look forward to seeing your other videos. If you haven't done so already, a video on sensor wiring would be a good topic.
Thank you, we're glad you enjoyed the video! And thanks for your suggestion 👍
I have a N80 short high and closed circuit code on a 2017 jetta. I replaced the valve but no fix, I think this might be my issue, I dont think im gonna be able to fully go into this diagnosis without those special tools. This ones gonna have to be sent to the dealership but im glad you taught me all of this on the exact same car im working on.
Brilliant stuff. Thanks for sharing some of your knowledge. Your videos are very well produced 👌🏻🔧👍🏻
Thank you so much! We appreciate it and are glad you like the video👍
Hope for more videos like ECU or TCM programming
Brilliantly explained. Thank you
Thank you, we're glad you liked the video!
Ever come to north dakota don't it's cold and my car has been in a shop for 2 fn months over a dam wire a wire, my mechanic is a ass hole he works on big business vehicles so little old me doesn't matter,having 2 special needs children and spending almost 10 grand on the car and paying fools to charge me 500.00 5 times and stilllllll no car 2 dam months 😢dam sorry for all the negative but it's hard without a car
@@Nicole-dj3jf i'm a fellow american and the reason u have this much trouble finding good mechanics is the nation hs had a severe shortage of truly competent and qualfied such workers. This has a lot to do with our national and state politics over the past forty years, where conservative fought like hell to not allow any educational programs or expansion of such. Idiots!
Informative and easy to follow unlike most automotive wiring harnesses lol
Another great video, thank you for this valuable tutorial, please post more, Cheers 😊
This is extremely good information demonstrated very well. Thank you.
Well explained Mate I am very impressed.
Great video, you should make a video on load testing circuits to check wire integrity
Very good information greatly appreceated .
Defo more of these please.
Thanks. Learned alot❤
Very good explanation Sir with a Multimeter.. Merci, Watching from France.. Prevention is better than cure..
Excellent explanation, thanks.
thank you for sharing knowledge best regards
Thanks for the kind words! We are glad you like the video👍
Super valuable Sir
Learned a lot about electricity
Clear Excellent Explanation.
Earned a sub, great work
Thanks. What is the typical wire gauge used in ECU connecters?
Just great! Thank you.
New here and I love it ♥️♥️♥️♥️♥️♥️♥️♥️
Getting to the point where you know what terminals and connectors you are dealing with is the hard part, and actually getting to them
thank you Very helpful 👏🏼👏🏼
Excellent, excellent
Great video!
Excellent explanation thank you
Great video 👍
Thank you! Glad you enjoyed it 🙌
Hello 🌞Advice, You need to put dw40 in all the car's electrical harnesses to avoid problems in the future 👌🏻 once a year ok
this is very helpful thank you
nice one Tim, yeah keep videos coming, thanks
Thanks for the feedback, we will keep them coming!
Great video
Good job thenks Mr teacher
Great information.. anything on ignition cools and injector tests thanks
Hi. We are glad you liked the video! We have a video that touches on how to diagnose a faulty injector here: ua-cam.com/video/jF9atOqq3Mc/v-deo.html, however we do plan on making a more comprehensive guide on ignition coils and injectors at some point in the future!
this is all very bewildering
Excellent
Bsi unit, potentiometer (throttle pedal) and air mass flow. All 3 continuously showing up on OBD "incoherence fault". apart from BSI the others have been changed for genuine replacements. Vehicle goes into limp mode after a 1/4 mile drive.
you skipped over the critical items. 1. do you disconnect the battery for continuity tests ? 2. how do you know where the far end of the wire you are testing goes (tracing)
Dude…exactly. This is dangerous
Use a wiring diagram
Brilliant content as always so thankyou for that. Quick question. Where can you get those drag tool tester kits as i have the pin removal tools but not those and Google doesn't show anything.
Hi. We're glad you enjoyed the video! The drag tools can also be called terminal tension/pin tension tools but they can be hard to come by. Some suppliers sell these specific tools: www.autotechelectrical.com/ but if you are unable to source these, then a good alternative is getting terminal test lead attachments for your multimeter which will do the same job: www.hubitools.com/en/catalog/diagnostic-test-lead-set~0389d3b3-3acb-2bce-9ac0-39eabe1ce34f However these usually come in big kits which makes them fairly expensive. Finally, if those two options aren't for you, you can always buy replacement terminals/pins for your vehicle and use those! Hope that helps.
@@Ecutestinglimited brilliant thanks for taking the time to reply in your busy day.
@@the_retired_mechanic No problem at all. Let us know if you need anything else!
Hi ECU Testing, I have a 1989 Pontiac Firebird with a high beam indicator problem. When I turn on my headlights, the high beam indicator light stays on continuously. The car will will switch between high and low beams and I've noticed that the indicator shines a little brighter when it's on high beams. I have the service manual and it shows power to the headlights coming through the high/low beam switch with one low beam tan wire going to the low beam element and then to ground on the low beam circuit. The high beam circuit shows a green wire the high beam side of the high/low beam switch and splitting into two green wires on the output of the high/low switch where one green wire appears to go to the high beam element and then to ground while the other green wire goes to directly to the high beam indicator light and then to ground. I've checked the grounds for both headlights and and they appear to be solid with 0 ohms. I've also checked the continuity of the high/low beam switch and it seems to be okay. Do you have any suggestions for finding the ghost voltage feeding my high beam indicator light?
Thanks, Robert
My favorite cars to test is the VW Jetta, specifically the ECM connector as they rivet a steel plate over the connector so that you can’t just easily remove it to test the systems :) thanks VW
Will the crimp sleeves create excess resistance to cause abnormal current flow in the CAN bus system?
Hi. If done with good technique, i.e a good strong contact is made and heatshrink is applied, then using crimp sleeves should not create excess resistance in the CAN bus system.
I had someone tell me that it’s not good to use solder because you’re mixing two metals. What are your thoughts on that?
6.47 you say to isolate the wire? Are you saying unplug from the connectors as in De pin but leave all the rest connected in the terminal blocks?
Hi. Yes, if you remove the affected wire's terminals (de-pin) from both connectors then the wire should be isolated from the circuit. Plug both connectors back in and test for continuity between battery ground or battery voltage depending on which you suspect it is shorted to. Hope that makes sense!
@@Ecutestinglimited it does thank you. I was just trying to suss out if you were doing it differently with them still connected.
Electrics are not everyone’s friend, especially mine. I came across your videos and enjoyed your explanation and theory. Instant subscriber thank you.
If i wanted to check a coil pack connectors continuity do i have to remove battery terminals before doing so being the connector is still connected to the harness?
Nissan miccra k12 crank, but no start , no ignition coming to the coils . lately. I found that the socket that coming to the ignition coil melted happened twice.
Liked your video straight to the point myself I always use the dynamic voltage drop to get all I need positive side and neg side in all connections to find problems anyway where did you grab your tension key tools love them thanks again sub and liked looking forward to watchig more
Hi. We're glad you enjoyed the video! The terminal tension/pin tension tools can be hard to come by. Some suppliers sell these specific tools: www.autotechelectrical.com/ but if you are unable to source these, then a good alternative is getting terminal test lead attachments for your multimeter which will do the same job: www.hubitools.com/en/catalog/diagnostic-test-lead-set~0389d3b3-3acb-2bce-9ac0-39eabe1ce34f However these usually come in big kits which makes them fairly expensive. Finally, if those two options aren't for you, you can always buy replacement terminals/pins for the specific connector you're testing and use those! Hope that helps.
@@Ecutestinglimited Appreciate this thanks again.
Hi i dont get the voltage drop test .You say to test from end to end will a multi meter pick this up without being connect to the negative?
Hi, very good question! Yes the multimeter will produce a reading even without being directly connected to a negative. This is because in order for current to flow through the wire, the circuit must be complete by being connected to a ground point. While you're not directly touching a ground point with your multimeter probes, the circuit itself is grounded through its connection to the battery's negative terminal or another grounding point. This shared ground ensures that all components in the circuit have a common reference point for electrical potential.
By placing one probe at the start of the wire (or one side of the component) and the other probe at the end (or the other side), you're measuring the voltage difference between these two points. This difference is the voltage drop, which occurs due to resistance in the wire or component. The multimeter doesn't need to "know" they share the same ground in an explicit sense; it simply measures the difference in electrical potential between the two points you're testing.
In the video, we have shown a simplified wiring diagram only showing the 12v power supply wire to the alternator, whereas for this circuit to be complete there would also be a ground wire going back to battery negative or a ground point on the vehicle (in most alternators this would be the casing of the alternator itself which is attached to the chassis). Hope this helps!
@Ecutestinglimited Of course. Thank you . Great videos by the way .I'm a spark of 30 years myself but working with single and 3 phase AC is a different ball game no where near as technical as ur game ,and I think my knowledge apart from using a multi meter is a hindrance more than a help when it comes to cars.That said I've never understood Canbus until I watched ur video today.and it's very much the same as testing and fault finding a ring main .
Thanks again mate
Nice
Would you solder a Relay if used in a car? Many places inc google are all for crimping etc, but surely a soldered connection for an immobilser and a relay should all be soldered and then taped up? What is your opinion ?
Depends on location. Solder could break due to heat or vibration. Clamping with proper tools and quality materials will last those elements. Hope that make sense.
I did solder wires behind my headlights but that’s away from engine. So it’s still working 3yrs+,
Thank you for the Video I need help with my 1.8 ,3 ,1994 Jetta if I switch on the car it cuts out the electronic coil I replaced 5 coils in a short time please can you help me Sir Thank you
Can check the can at the end connection Tell me if the ECU is bad so
I have problem on my Smart 450. All fuses are good, but when i set my multimetter to diode mode and test between positive and negative terminal i have continuity. Also my alternator is shorting to the ground. Problem manifest in instrument cluster turn on all lights even after key is removed from ignition. Just to mention alternator is charging fine. About 14.3v when car is on
I know this segment is upon wiring. I saw another video of yours which was speaking about codes for example P1254. I would like to know what does code P12A2 I have VCDS software yet nothing in code aspect states what the code is for a 07 Audi Q7 engine 3.6L V6 can you explain to me what that code is and direct me to check it for repair thank you.
when diagnosing a short wire, how can i tell what voltage i should be reading on the multimeter?
@joyous6696, It would depend on circuit design, some are 12v some are 5v ref
Hello Big man I love your job and I really want be your friend am a car eletrician
Vw passat 2018(142k)i got EPC sign and engine light on. I put the new spark plug, throttle body, ignition coils and also cleaned the fuel injector but still its there. ANY SUGGESTIONS????
@Dilmohittt, What are the stored dtcs?
Please let us know where to get the needle type probe attachment for multimeter wires.
Hi. You can get these attachments as part of a multimeter accessory kit from automotive diagnostic equipment suppliers such as Pico Technology: www.picoauto.com/products/clips-and-adaptors/backpinning-probe-set
Alternatively, and depending on budget, you can get the needle/pin probes on their own from online retailers like Ebay or Amazon.
Thanks Sir.. love it.. done subcribe for more ❤
With Ya Mate From Big Island Hawaii, Lots of Crazy shiite here, My Dashboard is a Firework Show, Quite Entertaining.
thanks
Always test your circuits dynamically
Yeah, a wire might seem good but can short or create open loop when moved.
Ideally, if your multimeter beeps when shorted, you can try shake the cables and connectors a bit and listen for interrupted beeping.
Hi!
My mother bought a 2016 GMC - and turns out to have wiring issues, I'm not too familiar with repairing my own vehicles. She seems to be intimidated by asking local mechanics about the issue. I don't doubt that the cost to have a vehicle wiring fixed or redone would be cheap. This is the first step in diagnosing the issues? She seems to think because of one mechanic that she needs the whole vehicle completely rewired!
I question that- even if it did they made it sound like the whole vehicle needs to be gutted and every wire needs replaced.
What are my options ? And are my instincts right about these guys?
I need to know what the wires are coming from thst go into the camshaft plug ? Please help my wires are broken in half !!!-
Video working
I am a beginner..can a technician use a analog multimeter to do this?
You can carry out the testing methods highlighted in this video using either an analogue or digital multimeter. However, a digital meter is always preferable as it offers more precision and reliability in results, especially when testing circuits dynamically such as during voltage drop testing. Also keep in mind that with analogue multimeters you will need to select the correct range when carrying out your tests to prevent damage to the multimeter. Hope this helps!
I own a 2005 Ford Taurus. I have a stalling issue that shows no code at all. I feel this may be the problem as I have had tune-ups, replaced fuel filter, MAF and IAF sensor I am baffled. It will start right up, drive fine for awhile then randomly stall. All dash light illuminate still no codes. Could it be ECU? I love this car but it is draining my bank account
Unlikely its ECU as it would probably show fault codes
Could be something as simple as a dirty throttle valve
wiring issues? the mouse is king! :)
Any chance of a battery drain diagnosis video
Thanks for your suggestion, we will look into this in the future!
in ilustration is write 0.062 ohms per 1m but when you speak you say 0.026 per meter, what is correct?
It should be 0.026Ω per meter of wire, apologies and thanks for spotting that!
Is it safe to power fuel injector relay from another relay....ecu pulse is weak to fuel injector car won't start
morning....have any ideea why my car dosent comunicate with CAN?my vcds says j533no comunicațional with CAN gateway...no comunicate with batery module...and generator...The car îs an a6 c6 year 2010....thank you very much
Hi. We have actually recently completed a video on diagnosing CAN bus faults here: ua-cam.com/video/fZMNzKpCGfc/v-deo.html The video goes over some basic principles of the CAN bus network, however, as your system includes a gateway module, the diagnostic tests at the OBD2 port may not be the same. The fault will likely lie with either the gateway module or the alternator (generator), so you will need to unplug the alternator to see if the fault disappears. If it doesn't, then test the integrity of the communication wires between the two. Finally check the gateway module's power (sometimes fused) and grounds. Hope this helps!
@@Ecutestinglimited hello...i unbluged The alternator wire...and all The erorrs disapear....ca u tell me that u check next?should i duble check The alternator regulator ....install The corect Code ?
That indicates the alternator is faulty. We have done a video on diagnosing faults with the alternator here: ua-cam.com/video/gpFlPU2HQkY/v-deo.html but as you have said, it is likely a fault with the voltage regulator. Depending on the model of alternator you have, the regulator can be replaced without needing to replace the whole alternator, however we would recommend getting this confirmed by a qualified mechanic who can advise you on your specific vehicle.
is there one of these to help urgent
electrical professor
electrician
electric technician
my case :
( when i connect the multimeter red to red the + / and black probs ) . gives reading as continuity
important notes :
1 - NO BATTERY
2 - multimeter ON Diode mode " continuity"
- is that normal - ?!?!?!
More please
I was told a while ago that a lot of modern computer controlled cars have resistive cables ! So I'd assume that if you have to re solder a cable, the pc controller would know this and still flag up a fault ? Apparently.
Modern vehicles can use a variety of cable types, however resistive types are normally for specialised components and the majority of the vehicle's electrical system uses standard copper wiring in which a properly soldered joint shouldn't cause any problems. However, it is always worth consulting your vehicles repair manual or schematic to ensure you are following their guidelines.
Hi Guys is the any body know about (Energy economy mode activated)in peugeot 2008 1.2 model 2022
Hi,I am Ali from Egypt ,I have car Renault Clio sedan model 2008 1.4 CC 8V ,I have many problem with it and many electric technical in Egypt did not where the problem and when put it on the OBD2scaner it say it no problem in car ?! So please can you help me the problem is in the ideal speed and car stop the car engine sound up and Down and motion too and the RPM to it move up and down but between speed 750 as up and 500 as down and I have another problem in the morning when I start the engine it start quickly without problem when I go to work and in the end of the work day I leave my car under sun in the park when ride it and start the engine the engine lake and did not start immediately it take one 30 second to start up and another problem with windows glass when I up the widows and the windows is closed and if I did not left the glass button the heat indicate is up as the car was very heat I don’t know what the reaction between the widows button and the heat indicator can you help me please
It helps to know the correct reading for the wires you are checking. And. Good luck finding a multimeter w/ wires that long. You’ll have to get the correct readings from factory manual.
AND…. What setting are you using on Meter??
What is “knot to knot .6” in American English? 1 to 1.6?
We are saying 'nought' which means 0. So it will be 0 to 0.6.
@@Ecutestinglimited awesome, thanks boss
Hello, after longtime....😊
Here, 12V Vs 7V...
I have one Super CONFUSING VOLTAGES READINGS on door opened or closed status.
For example, in i20 2011 India version without LCD display on instrument cluster, the voltage at any door switch is SOLID 12V when door is closed, and immediately drops to SOLID 0V when it is opened.
Now, in today's modern car like Toyota Glanza and Toyata Taisor which has LCD display, and for the same situation, when door is closed from opened, the voltage remains at solid 12V, and after about 20 secs, the voltage drops to SOLID 7V.
As soon as door is opened, it changes to 0V.
Now, when the door is closed again from opened, the voltage immediately rises to SOLID 12V, and stays for about 20 seconds, and then only drops to 7V.
Now, why is this voltage drops delaying from 12 to 7??
What's the purpose or significance of this delay in voltage drops?
Why not immediately changed to 12V from 0?
Why 12V, and then later slowly to 7V???
Broken wire e.g. bad connection.
@@cosmicHalArizona no ....
Its happening in Toyota Glanza and Taisor.
Wow, another "ultimate" guide in just 10 minutes, and that includes a 1 minute intro.
Gee, UA-cam is great.
Hi you are from which country sir
He's obviously British!
I found the ground for my 2000 chevy s 10 fuel pump on the back left side where the back lights are grounded!!!! GRRRRRRRR!
i think you are a prof
😂
I forgot to include the fact that when my Taurus stalls and shuts down, it will start right back up like nothing happened. Any input would be welcomed. My car only has 70,873 mi.
Класс
Still don’t understand where in real life to put the multimeter cables
❤❤
👍
Anybody else having a project car and search up this video 😅
yeah, planning to re wire my 1993 civic😀
1994 Jeep Cherokee 😂