It’s funny that all the other videos on UA-cam explaining alternator diagnostics were nowhere as complete and explanatory as this one. It’s a shame that individuals like this guy don’t get the credit they deserve. Bravo 👍🏼
Thank You! Although I am certified in electronics, I don't know Jack about automotive. On my own I only knew up to doing an accessories load while measuring voltage to confirm the alternator works - idling versus revving the engine should cause the voltage to go up a couple of volts - if it doesn't your alt or alt buss fuse or maybe alt wiring/connector is failing. But you brought it to a new level with all the rest of the measurements on either side of the alternator to ground, getting current draw measurements by opening the circuit at different connection points and inserting your meter in series... and what it all means... Those who work on cars part time or for a living will gladly pay for this level of knowledge. Great presentation, very clear delivery, easy to follow! You earned me as a subscriber from this one video alone!
Excellent video both in quality and content, one of the best instructional videos on UA-cam. .Sir you are a real asset to the UA-cam community. Thank much for posting this video.
Man thanks for the video.. I am an Automotive tech also, but I havent worked on many asian makes and a family member of mine bought an exact 10' camery XLE from a subaru dealership with a 30 day warranty. This family member asked me to look at the vehicle, so I did and i noticed when testing the alternator with loads on it would drop to 12.3v. I tested it also using my snap on battery, starting,charging system tester and failed for low out put. So I told them bad alternator, She then take it to the Subaru dealer she bought it from to get them to cover it. The service advisor told her it tested good no problem and asked to speak to the person who said it was bad. So I call up there (I never play the Iam a automotive Tech I know what I am talking about ego) I explian what I found and she asks me well how did you test it? I told here my DVOM and Snap on system tester. She tells me they used the same tester and it tests good. I told her look this is a 2010 toyota so it doesnt have a Smart charge system on it so the rule of them of 13.5 to 14.5 is in play here and it drops to 12.4v with loads on, thats not good. Well she says no thats fine its not going to kill the battery. I told her not today i wont but if it works like that for 1 year i bet it will. Anyway it drove me crazy what she said so I looked in the Toyota University Electrical training manual I have from a Worldpac class I took and it shows a 2010 charging system and even says at no load idle it should be 13.5 to 14, with load at idle should be 13.6 to 14.5.
Great diagnosis and im gonna check out your other videos with this impression. I have a 2009 camry I4. It's got a NAPA alternator. Upon starting the car i see that the voltage is 14.1-14.5. But after 30 mins of idle/driving the voltage drops to ~13.5 (no lights or blower motor on). Is this a sign that the alternator is degrading? Battery shows 12.5-12.56V when the car is shutoff
Thanks for the quick response. I wish you were in the northwest. O'Reilly was telling me that the voltage regulator is faulted and alternator is nearing its end too. But all that they did was hook up a tester and tuned the CCA and tested with engine on once and off once. Is their test result reliable?
Hello. Can you tell me about the Toyota Sienna 2008. The blue wire from the generator reads 0. All other 3 wires on the connector show more than 0 when the ignition is on. There is no battery power.
At idle my 2001 Camry battery light on the dash comes on but when the rpm’s are raised the dash battery light goes off. I checked the alternator and it was just putting out a title 11 then if I raise the rpm then it’s putting out 12.5 volts . Do these alternators have a regulator brushes on the rear that can cause this? My alternator is just 2 weeks from being 2 years old. Just wondering if could be voltage regular brushes.
Amazing Video ! But I have one question, my Toyota Camry 2011 le keeps on burning my fuse. The blower fuse is little bit burnt should I replace it and fix the fuse line or get another fuse box from an working condition vehicle that has been used and in good condition for 35$ bucks Toyota Camry blower fuse is 25$ bucks and plus to fix it will be additional 5-10$
So I had disconnected the blower motor while the car was running and it stop, afterwards I plug it back in and it was working But I’m still thinking it’s going to burnt my blower fuse
Are you Jiveny Kit... in Frederick Maryland? We are in Baltimore County and have been fighting an intermittent charging problem in my sister's '09 Camry for at least 2 years. I think she had an alternator and new battery installed back around 2021 or 2022 and it never seemed to be 100% fix. I could have "guessed" that it was the alternator after testing with my multimeter like you did, but without a scan tool, I haven't been able to back test the connector on back of alternator. Also, I watched a different video a few weeks ago, that one says that the large wire you first tested is always HOT. They mention that unless you disconnect the battery, one has to be super careful not to ground out that hot wire with the wrench/ratchet or anything metal.
“Check charging system message” first showed for me last night while I was driving and it caused all the dash lights to come on and disabled my power steering and turned on ABS and all so I pulled over to turn off the car. Then it wouldn’t start. So replaced both the battery and alternator and I am still getting this message. The car starts but no way I’m driving like that for another dangerous situation again. Any idea what else could be causing this?
Great video and thanks. How many miles did the Camery have? This just happened to me on my Acura TSX 06 and I gist smchanged the battery and thoughts it was a bad battery, but 2 days later, the dash light all came on. So now I now it’s either the alternator or the charging cable connector or the battery connections.
I have same car I replaced alternator brand new and battery because alternator just went out but now it only charges to 13.4 never more with accessories it stays at that even when driving on highway reving up engines after hours the voltage Never goes past 13.4 I have no idea what going on when I turn car off the battery reads 12.6 volts then car running goes straight to 13.4 and I can unplug battery while cars running and it stays running so it’s not the alternator it was doing the same thing before my other 1 died any idea
@lilcxiong7501 you might have a wiring issue or maybe the new Alternator is defective out of the box!! I recommend you take it to a pro mechanic who can diagnose it for you!
My 01 Camry is getting me a headache, went through 4 alternators 2 new batteries. And everytime I install a new alternator it always telling me charging is too high and battery light won't turn off.
brother i have ford fiesta mk6 1.4 tdci my problem is that whenever i start the car battery warning light comes on the dash but if i fully press the throttle all the way to 5k rpm it starts charging and light goes offf , plz help me to solve this issue . this problem started while i was driving home
We have a 07 es Lexus 350 battery was dead. 5 year battery needs it anyway.put a new one in wife drove it to work it came home on a roll back wrecker.she said smoke was coming from the alternator side of the car.their was a ark on the neg side of the new battery when I put the cable on.is it possible the alternator shorted killed the old battery then burned up completely with a new battery?? Thanks William
@@KITS_Auto_and_Truck_Repair thanks I used a test light between the neg on the battery lights on so eather I have a load or a short.Looks like I'll be pulling fuzes.never seen a alternator smoke like.
@@KITS_Auto_and_Truck_Repair thank u.i subbed because of your great knowledge of electrical. On these new cars.dont have a cool snapon to check with tho.lol
14.5 at the battery would be an inaccurate assumption. Some of the hondas will only have around 12.6V at idle with no loads on the vehicle. They do this help save load on the engine for fuel economy and emissions. I would expect the opposite. 13.6 at idle and 14.5 with loads on the vehicle.
Did you ever solve it? Any other symptoms? I had low idling that would cause my car to stall in the middle of traffic or at stops. Cleaning the throttle body solved that issue. However, now my alternator has gone bad within a year. I honestly believe it was b/c something was splashing antifreeze under my hood before I replaced my radiator(and perhaps some liquid got into it). I'm going to buy a multimeter first to check the fuses for appropriate voltage (to the alternator) and then proceed to use my warranty to replace the alternator as well.
It’s funny that all the other videos on UA-cam explaining alternator diagnostics were nowhere as complete and explanatory as this one. It’s a shame that individuals like this guy don’t get the credit they deserve. Bravo 👍🏼
@matthewrichardson6263 Thank you!
I love the ways this gentleman showed to test
😊thank you so much
I wish if I know where he works
First alternator video I've seen where you discuss the importance of the control wires and exactly what they do. Well done.
@cvr24 Thanks!
I love seeing a proper diagnostic done before firing the parts cannon. Great video!
Alex P Thank you!
Brilliant explanation, I have watched so many of these vids on here to sort my alternator, this is definitely the best.
@rickhicks2445 Thank you!
Thank You! Although I am certified in electronics, I don't know Jack about automotive. On my own I only knew up to doing an accessories load while measuring voltage to confirm the alternator works - idling versus revving the engine should cause the voltage to go up a couple of volts - if it doesn't your alt or alt buss fuse or maybe alt wiring/connector is failing.
But you brought it to a new level with all the rest of the measurements on either side of the alternator to ground, getting current draw measurements by opening the circuit at different connection points and inserting your meter in series... and what it all means... Those who work on cars part time or for a living will gladly pay for this level of knowledge. Great presentation, very clear delivery, easy to follow! You earned me as a subscriber from this one video alone!
Stephen Doane My Pleasure! I appreciate you! welcome to our youtube community!
this was the best and complete explanation , very useful and practical.
@masoudf7088 Thank you!
KD- fantastic job, u are a international professional in diagnostics,thank u ,is your friend Habib Auto from Ghana Accra West Africa
Suleman Habib Thanks my friend!!!
Your explanation is on point! Nice work.
@bammbammcali Thank you!
Nice job of testing the system instead of just replacing the alternator!
Monte Hyler Thank you!
Thank you, very detailed review, I appreciate the help.
@user-sp7kt7vw7w My Pleasure!
Excellent video both in quality and content, one of the best instructional videos on UA-cam. .Sir you are a real asset to the UA-cam community. Thank much for posting this video.
Thomas Powers My Pleasure!! Thanks
Man thanks for the video.. I am an Automotive tech also, but I havent worked on many asian makes and a family member of mine bought an exact 10' camery XLE from a subaru dealership with a 30 day warranty. This family member asked me to look at the vehicle, so I did and i noticed when testing the alternator with loads on it would drop to 12.3v. I tested it also using my snap on battery, starting,charging system tester and failed for low out put. So I told them bad alternator, She then take it to the Subaru dealer she bought it from to get them to cover it. The service advisor told her it tested good no problem and asked to speak to the person who said it was bad. So I call up there (I never play the Iam a automotive Tech I know what I am talking about ego) I explian what I found and she asks me well how did you test it? I told here my DVOM and Snap on system tester. She tells me they used the same tester and it tests good. I told her look this is a 2010 toyota so it doesnt have a Smart charge system on it so the rule of them of 13.5 to 14.5 is in play here and it drops to 12.4v with loads on, thats not good. Well she says no thats fine its not going to kill the battery. I told her not today i wont but if it works like that for 1 year i bet it will. Anyway it drove me crazy what she said so I looked in the Toyota University Electrical training manual I have from a Worldpac class I took and it shows a 2010 charging system and even says at no load idle it should be 13.5 to 14, with load at idle should be 13.6 to 14.5.
@thelifescout8335 that's crazy Bro! you're right that Alternator is gonna give up eventually!!
Excellent Video mate. Very good guide My dad's car is having the exact problem on his car Toyota Camry 2009
Raymond Bandt Thanks!!
Very thorough! Loved the known good vs known bad signal voltage
thanks bro!!
@Sylas Mohamed your name suggests that you should not have a girlfriend...;)
Great diagnosis and im gonna check out your other videos with this impression. I have a 2009 camry I4. It's got a NAPA alternator. Upon starting the car i see that the voltage is 14.1-14.5. But after 30 mins of idle/driving the voltage drops to ~13.5 (no lights or blower motor on). Is this a sign that the alternator is degrading? Battery shows 12.5-12.56V when the car is shutoff
@lakshmikanthsandra No! that's fine
Thanks for the quick response. I wish you were in the northwest. O'Reilly was telling me that the voltage regulator is faulted and alternator is nearing its end too. But all that they did was hook up a tester and tuned the CCA and tested with engine on once and off once. Is their test result reliable?
awesome video and awesome instructor. Lesson well explained and conducted.
robert gonzales Thank you!
very well done thank you. what if you read a small voltage on the negitive side of battery and case of alternator
@user-nz2wo8vz2w As long as that voltage is below 200mv you're good!
Hello. Can you tell me about the Toyota Sienna 2008. The blue wire from the generator reads 0. All other 3 wires on the connector show more than 0 when the ignition is on. There is no battery power.
@nemangrad the testing procedure is the same!
At idle my 2001 Camry battery light on the dash comes on but when the rpm’s are raised the dash battery light goes off. I checked the alternator and it was just putting out a title 11 then if I raise the rpm then it’s putting out 12.5 volts . Do these alternators have a regulator brushes on the rear that can cause this? My alternator is just 2 weeks from being 2 years old. Just wondering if could be voltage regular brushes.
@bond_jamesbond7547 Yes! it could be and make sure your Alternator Belt is well Tensionned!
@@KITS_Auto_and_Truck_Repair yes belt was perfect and new.
Excellent explanation. Well detailed.
Tanks.
@juangiraldo1161 My Pleasure!!
From Kenya, thanks for the great knowledge
Douglas the mechanic My Pleasure!!
Amazing Video ! But I have one question, my Toyota Camry 2011 le keeps on burning my fuse.
The blower fuse is little bit burnt should I replace it and fix the fuse line or get another fuse box from an working condition vehicle that has been used and in good condition for 35$ bucks
Toyota Camry blower fuse is 25$ bucks and plus to fix it will be additional 5-10$
Wildy Lumeus your blower motor might be shorted!! disconnect the blower motor and see if the fuse stops blower!
@@KITS_Auto_and_Truck_Repair l’ll give a try tomorrow and I’ll give you a follow up about it, I’m going to subscribe to u
Thank you!!
@@wildylumeus6315 Sounds good! My Pleasure!
So I had disconnected the blower motor while the car was running and it stop, afterwards I plug it back in and it was working
But I’m still thinking it’s going to burnt my blower fuse
Great job K DIAG WAY TO USE YOUR SCOPE TO FIND THAT AC RIPPLE
Mark Ferraro Thank you!!
So well explained. Thank you.
IIWII9 My Pleasure!!
Very useful information, looking forward to see Yr next video.
Hardytch 82 thank you...
Excellent !!! Very helpful. Thank You.
Mike Murphy My Pleasure!
Are you Jiveny Kit... in Frederick Maryland? We are in Baltimore County and have been fighting an intermittent charging problem in my sister's '09 Camry for at least 2 years. I think she had an alternator and new battery installed back around 2021 or 2022 and it never seemed to be 100% fix. I could have "guessed" that it was the alternator after testing with my multimeter like you did, but without a scan tool, I haven't been able to back test the connector on back of alternator. Also, I watched a different video a few weeks ago, that one says that the large wire you first tested is always HOT. They mention that unless you disconnect the battery, one has to be super careful not to ground out that hot wire with the wrench/ratchet or anything metal.
@mlasch1478 Yes! I'm located in Frederick MD
Excuse my ignorance, can I test the disconnected alternator socket? I mean, the alternator on but the socket disconnected to see pulsations? thank you
@gabrielsolarte9310 the connector should be connected when you do the test!
“Check charging system message” first showed for me last night while I was driving and it caused all the dash lights to come on and disabled my power steering and turned on ABS and all so I pulled over to turn off the car. Then it wouldn’t start. So replaced both the battery and alternator and I am still getting this message. The car starts but no way I’m driving like that for another dangerous situation again. Any idea what else could be causing this?
Miguel Aldana you might have voltage drop in the Alternator wiring!
Very true guy and useful information thank you so much I will like to see more video as this one
Michael Johnson thank you!!
Great video and thanks. How many miles did the Camery have? This just happened to me on my Acura TSX 06 and I gist smchanged the battery and thoughts it was a bad battery, but 2 days later, the dash light all came on. So now I now it’s either the alternator or the charging cable connector or the battery connections.
Aaron Shen My Pleasure!! I'm glad to hear that this video will help you figure out what's wrong with your car!!! The Camry had about 197.000 miles
It's really helpful. Thank you very much.
Joe Las My Pleasure! I'm glad to hear that the video was helpful!
I have same car I replaced alternator brand new and battery because alternator just went out but now it only charges to 13.4 never more with accessories it stays at that even when driving on highway reving up engines after hours the voltage Never goes past 13.4 I have no idea what going on when I turn car off the battery reads 12.6 volts then car running goes straight to 13.4 and I can unplug battery while cars running and it stays running so it’s not the alternator it was doing the same thing before my other 1 died any idea
@kyleh5356 check the charging system wiring, it sounds like you have high resistance somewhere in the wiring that's causing voltage drop
Did you change the alternator or voltage regulator?
JanteiVoce I replaced the alternator!
Thanks. Awesome Video
@TNKHNA Thank you!
My battery doesn't charge, I turn on, the car oscillates between 10.9 or 11.20 is the alternator or voltage regulator? , I'm from Brazil
JanteiVoce you probably need an alternator, but make sure your wiring is good, first!
What could pssibly go wrong if i have a new alternator and battery install but my battery indicator light i a still on on the dashboard?
@lilcxiong7501 you might have a wiring issue or maybe the new Alternator is defective out of the box!! I recommend you take it to a pro mechanic who can diagnose it for you!
My 01 Camry is getting me a headache, went through 4 alternators 2 new batteries. And everytime I install a new alternator it always telling me charging is too high and battery light won't turn off.
Dcthetruth85 check the charging system wiring for high resistance,
Great video!!! You are the best👍👍👍
Jose Angeles Thank you!!
brother i have ford fiesta mk6 1.4 tdci my problem is that whenever i start the car battery warning light comes on the dash but if i fully press the throttle all the way to 5k rpm it starts charging and light goes offf , plz help me to solve this issue . this problem started while i was driving home
@motologist1917 it sounds like your alternator belt is loose or the alternator is starting to go bad!
@@KITS_Auto_and_Truck_Repair ok thank u
A great helpful video!! Thanks!
lakedawg87 My Pleasure!!!
We have a 07 es Lexus 350 battery was dead. 5 year battery needs it anyway.put a new one in wife drove it to work it came home on a roll back wrecker.she said smoke was coming from the alternator side of the car.their was a ark on the neg side of the new battery when I put the cable on.is it possible the alternator shorted killed the old battery then burned up completely with a new battery?? Thanks William
William D yeah that's possible. was the battery terminal tight enough? you should test the alternator and it's wiring!!!
@@KITS_Auto_and_Truck_Repair thanks I used a test light between the neg on the battery lights on so eather I have a load or a short.Looks like I'll be pulling fuzes.never seen a alternator smoke like.
@@williamd6967 yeah that's weird, follow the steps on the video to test the alternator wiring... Good Luck!!!
@@KITS_Auto_and_Truck_Repair thank u.i subbed because of your great knowledge of electrical. On these new cars.dont have a cool snapon to check with tho.lol
@@williamd6967 lol !!! sounds good, Thank you
Great video
Juan perez Thank you!
14.5 at the battery would be an inaccurate assumption. Some of the hondas will only have around 12.6V at idle with no loads on the vehicle. They do this help save load on the engine for fuel economy and emissions. I would expect the opposite. 13.6 at idle and 14.5 with loads on the vehicle.
@marlinyoung1606 Good!
Good job🎉
@technop.8461 Thank you!
Thanks man! I've been chasing a problem like this for two years now. Changed two alternators and 3 batteries, nothing works..
AfroMyrdal My Pleasure!! I hope the video will be helpful to you!!
Did you ever solve it? Any other symptoms? I had low idling that would cause my car to stall in the middle of traffic or at stops. Cleaning the throttle body solved that issue. However, now my alternator has gone bad within a year. I honestly believe it was b/c something was splashing antifreeze under my hood before I replaced my radiator(and perhaps some liquid got into it). I'm going to buy a multimeter first to check the fuses for appropriate voltage (to the alternator) and then proceed to use my warranty to replace the alternator as well.
@@TuscanWonder never got it fixed and car got scrapped a few months back, sorry. hope you find out whats wrong!
@@AfroMyrdal Sorry bout that man. Good luck and thanks
@@AfroMyrdal alternator fixed it
First rate video. Thank you.
Murray MacNeill My Pleasure thanks
Excellent presentation
Shamsul Arfeen Thank you!!!
My battery does not charge I turn on the car oscillates between 10.9 or 11.20 is the alternator or voltage regulator, I'm from Brazil
JanteiVoce your alternator might be bad, but check the wiring first!
Awesome thank you
Joey Nutting My Pleasure!!
I have a v6 camry, twice i had electrical issues, when i removed the engine cover i found mice nest made with a punch of wiring harness and insulation
I'm Not sure dang!! that sucks!!
Nice job
The BRIDGE 54 Thank you!!
thanks
Aymen Mohamed My Pleasure!!
Are you the shop owner
swav100 No I'm not!!
You great guy
Michael Johnson Thank you!!!
seem some corosion at terminal .. that needs cleaning too
CraigBMM thanks for your input!! that was taken care of !!
Your video is amazing but you are talk too much
@shoukryguirgis4349 Thanks for your feedback!
Ничего не понял, есть на русском?…🤔
My
good!!