How to Test an Alternator ( Testing the Voltage Regulator, Diode rectifier and Stator)
Рет қаралды 4,523,176
Күн бұрынThis video will cover the following
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How to test an alternator using multi meter
How to replace an alternator
How to diagnose alternator charging issues
Alternator ripple test
How to test a voltage regulator in an alternator
How to replace bearing in an alternator ( Alternator brush replacement )
how to test a rectifier in an alternator
How to test diodes pack in an alternator
How ecu controlled / computer controlled alternators work
How to test drive belts in a car
How to replace a decoupler pulley
Diagnosing no charge , undercharging , overcharging alternator with multimeter
How to fix a rattling alternator
How to test fuses and relays
How to test alternator duty cycle
How PWM ( pulse width modulation basics ) works
How to read waveforms
why your battery light is on
How to find a voltage drop
how to use a multimeter
How to find a overnight parasitic battery drain
How to repair an alternator and finally, Deciding on brand new vs remanufactured
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@JunkyDIYguy 5 жыл бұрын
Guys, check out my latest video kzfaq.info/get/bejne/i61lZ9ulmpzZiqM.html
@tattedone6753 5 жыл бұрын
I have a question about my vehicle do you have a email I can message you at?
@djeletropopstarify 4 жыл бұрын
I have kind of dirty but perfectly working alternator, but it's kind of plug up with all kind of junk is there proper way to clean the alternator inside component's? and what it's proper way to do it
@azizmakka7126 3 жыл бұрын
Very helful vidios
@azizmakka7126 3 жыл бұрын
Sar. plese show me how to chek ulternet motor (capacitor) rely
@waziraliwazirali6095 3 жыл бұрын
Hi
@davidbarlow269 2 жыл бұрын
I am an electrical engineer of some 40 years experience. Your presentation is excellent. Your English is very good. Your video skills are very good. I like the use of gloves , I like your camera skills. Top marks...
@konquer247 6 жыл бұрын
It's people like that makes KZfaq a great source of information. Thank you for your efforts.
@arunadevi4734 4 жыл бұрын
You are Knowledge Hub. Great....
@gradyrm237 10 ай бұрын
100% the best alternator video on the internet. This cat showed me how to test everything in the circuit. Testing the pins on the connectors was a massive help. I needed to know if the PCU was sending the signal to the alternator first of all. Taking the alternator apart is out of my wheel house. I just needed to pinpoint my defective part. This homie crushed it.
@BlackwaterDSM Жыл бұрын
Hands down, one of the most informational and concise videos I’ve ever watched. The only way he could tell you more about an alternator is to show you how they wrap the copper up into a spool. Came here due to an overcharging alternator (first one OVERcharging in my 38 years of being a driveway mechanic) and was able to diagnose it thanks to this video. Thank you for such an awesome video!
@lukula2934 11 ай бұрын
Could not agree more. It goes to show how many YT "experts" only know enough to be dangerous.....
@BlackwaterDSM 11 ай бұрын
@@lukula2934 Right?! They help you out, alright…. Help you right i to the back of an Ambulance (or Hearse). 😬😬😬
@joeblow1711 6 ай бұрын
I agree!
@d.d4184 3 жыл бұрын
I am a technician,and this video very good with correct information. Not sure why anyone would give you a thumbs down.
@jeremyyang7234 4 жыл бұрын
This is the most detailed instruction for testing alternator I have ever seen.Thanks a lot.
@lucianoferreira613 3 жыл бұрын
My car stopped while driving. Thanks to two of your videos I diagnosed a bad connection between the positive terminal of the alternator and the battery ,gosh, I'm even speaking like a pro :) , I would like to give you a thumbs up for every euro you saved me. Thanks bro!
@yyxx5088 2 жыл бұрын
your patience, dedication and keenness to detail is much appreciated
@TR4zest 5 жыл бұрын
I found myself pausing frequently to try to absorb all your excellent information. Wow. Thank you.
@a.bax.5992 4 жыл бұрын
I've watched quite a few DIY videos on KZfaq and this is by far one of the most detailed and clear.
@danmaryam8201 2 жыл бұрын
Very educative
@CarAudioInc 7 жыл бұрын
the effort you put into these videos is phenomenal
@JunkyDIYguy 7 жыл бұрын
thanks buddy
@AlimKhan-xq7mc 5 жыл бұрын
Air Field lighting system how to use CCR and MCR and check the transformer
@FranklinHicks-qs4gs 5 жыл бұрын
Increase your vocabanizzle
@bobczz3919 4 жыл бұрын
This is the BEST video I have seen on the charging system. I never buy a new alternator or starter. I always rebuild them for a few bucks. I will not pay 300 or more for a new alternator or starter. Thank you for such an informative video.
@nil4309 4 жыл бұрын
Definitely the best video on this! Not only explains what to test, but why - and exactly what each component should be doing. Thank you
@elebeu Жыл бұрын
I especially appreciated the testing of the cables and ground for voltage drops. These are often overlooked and and multiple, small, voltage drops can add up to trouble.
@anhLe-hn3ig 3 күн бұрын
Best video to explain how to debug and repair a '09 - '13 Toyota Corolla alternator I have seen. Awesome dude! Thx Your English is excellent. I just replaced my '11 Corolla alternator, so I can attest the alternator used in this video. I wish I have the confidence to repair / rebuilt my own alternator rather than paying Autozone $305 after tax for a refurbished one in Jun '24.
@Etheo1ify Жыл бұрын
The most detailed video on how to test, diagnose and repair an alternator. Thank you!
@RS-yj3gn 3 жыл бұрын
This must be the best tutorial i have seen. Easy to follow and well illustrated. Thanks so much!
@andysmith7758 4 жыл бұрын
This is a GREAT tutorial! Technically right on, and thorough demonstartions and explanations! You know your stuff, DIY Junky! Thank you so very much!
@randyinchesapeake8129 2 ай бұрын
Now THIS; in my humble opinion, is what the internet was created for. To SHARE INFORMATION! (at one time called "the information superhighway") And this man did a damned good job of it!
@robertculver3014 5 жыл бұрын
Excellent. Does not waste time on simple actions. Goes deeper than many such sites.
@Roudter Жыл бұрын
I like how you measure for voltage differences between the terminals and their endpoints - eliminating connection problems. It's a good method for any older vehicle.
@jielsonlancenicolas5411 6 жыл бұрын
That was a clear explanation on what or how the the car alternator works. I appreciate this video so much!
@cheonglin1019 2 жыл бұрын
The is the best and most comprehensive video on alternator testings and diagnosis
@minaflores1018 5 жыл бұрын
I just wanted to thank you for being so specific when explaining how to test and what to expect to see. This is the best video online. Trust me when I say I have watched and or read almost everything available online and not one comes close to being a thorough as you. I have been trying to figure out why my new alternator and new battery in my 2002 c320 still is not charging I found myself in an under information sh&% show. Thanks to you I have all the information needed, so that I can go back out to my car and have a good chance in figuring out my issue. Thank you so very much for your help. Keep up the amazing work. its really appreciated. :)
@JunkyDIYguy 5 жыл бұрын
thanks mina
@Decimusblack88 8 ай бұрын
Did you figure it out?
@Norman92151 6 жыл бұрын
Very well done mate.
@DonVTOL 5 жыл бұрын
Best video on alternators I have seen yet!
@psuitt 5 жыл бұрын
I totally agree! The Junky DIY guy explains alternators perfectly.
@royvilla5833 5 жыл бұрын
Phillip Suitt I totally agree with you.
@seanys 5 ай бұрын
This is the only alternator video I’ve found on YT that covered what I actually needed know. Well done and thank you.
@humanresource9659 2 жыл бұрын
I know I'm basically repeating what another reviewer said but it popped in my head before I read their comment so I'm about to say it now: This is the most comprehensive review of an alternator I have ever seen Keep'em coming
@habsom1406 2 жыл бұрын
Superbly explained video. Clearly a very knowledgeable individual who knows his alternators and automotive electrics. Thank you for making, editing and uploading this reference quality tutorial. 😎👍
@nothinghere2067 4 жыл бұрын
A genuinely thorough and helpful video! Thank you!
@azmyin 11 ай бұрын
Sir, this was beyond GREAT! I followed the steps for checking a faulty alternator and found out that my friend's vehicle's alternator died due to running a 5+ year old battery
@andreasdrz1084 6 жыл бұрын
Information in detail, no bullshit... Really good, keep it up!
@angelzlatanovski5215 5 жыл бұрын
You are an awesome man. Explained everything. Thank you, thank you, thank you Sir!
@orleansadrianwhitakerarchb6422 5 жыл бұрын
I HAVE TO SAY THIS HAS BEEN THE BEST CAR TUTORIAL I HAVE SEEN
@rdyam 2 жыл бұрын
I've got a wide range of interests that I look up tutorials for and there's a very good chance this is the best I've ever seen - thanks!
@HamzahVerster 3 жыл бұрын
The most informative video I've ever seen on KZfaq 👌🏼 Well done mate. Please continue making videos like this. I wish you all the best and good luck 🙏🏼
@niopress5162 5 жыл бұрын
really appreciate the time and effort you put into making this video.your method of explanation makes it so easy to understand every detail.thank you so much.
@jessemerriman460 6 жыл бұрын
Thank you for taking the time to put this together!
@johnnymorris55 3 жыл бұрын
An exceptional demonstration of automotive mechanical, electrical knowledge. Shared so others can learn and gain from your experience and hard work. I take my hat off to you friend. Well done.
@mornebezuidenhout3003 2 жыл бұрын
Best video on alternator testing yet! Exactly the information other videos don't include. Thanks
@ricardoandrade7925 6 жыл бұрын
You explain really good! Thank you!
@nia6849 4 жыл бұрын
Wow, best explanation ever straight to the point.
@mikespain8655 4 жыл бұрын
This guy knows his stuff. Thanks, going to test voltage tomorrow on an old tractor with possible bad alternator.
@hruaitea_elemel 4 жыл бұрын
this is such a well made video.. exactly what i was looking for.. thank you for making amazing content
@freestyleskyline 4 жыл бұрын
Amazing, clear, concise and informative. Love the video man!
@maxxsmaxx1901 6 жыл бұрын
very precise demo and lecture . Thanks !
@728b 4 жыл бұрын
Wow! That was quite replete. I honestly didn’t know there was that much to know about an alternator. I’m certain to watch this several times to absorb all the information. Thanks.
@mgirano5822 4 жыл бұрын
A great thank you from France. You are very fast speaking but I can understand with the subtitles. Your video is quite complete and it helps me much in my problem with my Honda FR-V.
@jacobvance429 6 жыл бұрын
Your videos are very well done. Thank you for the detail.
@claybourne7162 3 жыл бұрын
Outstanding!! Thank you for taking the time to make this very detailed video!
@SirHoppalot 4 жыл бұрын
One of the best DIY videos I've come across lately, nice job
@rivrevvmedia 4 жыл бұрын
This is by far the best video on alternators I have seen! great job!
@kevinsmith8516 5 жыл бұрын
Excellent video, thorough and easy to understand explanation!
@jimnorrison8481 5 жыл бұрын
I just became an expert on automotive batteries and alternators.
@24pionu 4 жыл бұрын
MzMa
@sherazkhan2120 3 жыл бұрын
Hats off to you my dude, your a beast by covering all angles! Much love
@verylittlehouseonwheels5892 10 ай бұрын
You did a good job man I'm just a guy that worked under a quad Master certified mechanic that love to teach. You hit on all of it. He made me a mechanic where most people want to be a mechanic. I never use a book only for torque specs now that I'm not a active mechanic tend to watch a KZfaq page for surprises that book won't tell you the surprise once in the job
@janicesmyth2183 5 жыл бұрын
thank you for your great videos! I'm not a mechanic but learned quite a bit from your vids
@PJM454 5 жыл бұрын
Best DIY video I've seen on KZfaq. Great job. Going to subscribe.
@richardnolan9562 4 жыл бұрын
Whoever narrated this did a way better job than the f****** school I went to dude you're awesome
@marknaylor6550 5 жыл бұрын
Very very good, best alternator class ive come across
@TonyPablo 5 жыл бұрын
Everything you need to know about automotive charging systems, great video!!
@wrengouws3944 6 жыл бұрын
Brilliantly laid out step by step explanations and visual points! My friend I have legitimately gone through hundreds of videos here on KZfaq and yours was by far thee best in this category! I'm going to be in here like swimwear and dive right into your other videos! Very well done mate!! And thank you for creating this channel!! 👌
@JunkyDIYguy 6 жыл бұрын
Thank you very much
@sakasmeed 3 жыл бұрын
Very good presentation! So much information requires regular reviews, but its all there. Thank you!!
@peterd.1165 8 ай бұрын
Your video is very professional and brilliant - I have a 1996 Volvo 940 fitted with a Denso alternator (100/14) - some time ago it started to make a whining noise. So far, I have replaced the bearings and drive belt - The Alternator is in outwardly good condition but the Whine persists. With the engine running, the whine is stopped when the large battery lead is disconnected from the alternator and resumes when the lead is reconnected. It has been suggested to me that the noise may be coming from the rectifier.
@mudassirnaseem6111 6 жыл бұрын
very nicely explained. i would like to add couple of things plz excuse me. while checking the rotor & stators also check their ground resistance. i.e their should be very high resistance between slip rings & its shaft, also between stator & alternator's body. thanks
@swarfmonster3998 6 жыл бұрын
Great presentation, very informative. 5 star!!!
@DONphantasmo 2 жыл бұрын
this is one of the best alternator diagnosis videos on KZfaq. Thank you!!!
@damienkubik1380 2 жыл бұрын
Fantastic video, thank you. Very informative and easy to follow. Well put together, and thought out. Videos like this is what make KZfaq great.
@Aneurysm06 5 жыл бұрын
Mate, you're a legend, cheers
@autopilotone4 5 жыл бұрын
Thank you so much for an informative video. I have a parasitic drain and have pulled every single fuse in the car and it does not make any difference. Put a voltmeter switched to AC across the battery and wow, 29 Volts AC! That looks like a bad diode in the alternator!
@ninjaturtlegaming9890 3 жыл бұрын
Wow ! I cant express how much i like the video. I highly recommend this to EVERYONE !
@luism.raposo5138 3 жыл бұрын
Wow! I'm a mechanic and you my friend are very good at this. Good job. I subscribed.
@ajting3090 6 жыл бұрын
You are a great teacher! Thank you. No hesitation here to subscribe. All the best to you!
@edgarsalinas6408 5 жыл бұрын
good job , for sure one of the best videos outthere
@TAQEDAR 4 жыл бұрын
Thank you for your very helpful video. I know a lot about electric and electronics, but still I learned many things here about auto alternators. Thanks again!
@MrArrio45 2 жыл бұрын
Very simple and clear explanations to help the DO IT Yourself people.
@ratboysczurek2763 5 жыл бұрын
Phenomenally informative video!
@lasurvivor47 6 жыл бұрын
Very educational. Thank you. Great video.
@carlosberrios2638 4 жыл бұрын
Wao!!!!!!! This is like the most awesome video I have seen on youtube. The amount and quality of information it contains is invaluable. Thanks
@joamon559 5 жыл бұрын
Excellent video. Logically and clearly presented. Thank you very much.
@kareno8634 4 жыл бұрын
W0W! Talk about Testing to depths I never knew existed! Thanks! . . . _now > to test my brain for efficient 'holding power'_ = )
@johnswilley6764 4 жыл бұрын
Thank you Sir! Informative, succinct, articulate, and knowledgeable, also well produced video; without redundancy and unnecessary chatter. You are without a doubt among the best. I am now subscribed.
@69ztang 5 жыл бұрын
Feels like I was in a mechanics class. Nice video and explanation.
@s.mendez7160 Жыл бұрын
This was an excellent video, well produced and easy to comprehend. Thank you.
@mohabatkhanmalak1161 5 жыл бұрын
Thumbs up, you are very good at what you do. In my teens, around 1980, I did an auto technician course at diploma level, which has come in very useful over the years. The modern vehicles of today are so much different, especially the electrics and electronic systems and require your kind of expertise. Keep up the good work!!
@economist633 2 жыл бұрын
Where did you do that corse?
@economist633 2 жыл бұрын
Course
@mohabatkhanmalak1161 2 жыл бұрын
@@economist633 It was a correspondence course at a polytechnic in the UK. I was living in Dubai at the time around 1980. Nowadays you can get these courses much easily on line, but look for good, proper institutions. Some can be bogus.
@CORZER0 3 жыл бұрын
Wow, I remember when your channel was only 24k subs! You're gettin pretty big, congrats!
@JunkyDIYguy 3 жыл бұрын
Thanks corzero
@intestinalworm1202 3 жыл бұрын
This is a great video - well done! I used my multimeter to test an alternator out of the vehicle as per your video!
@stevespeck3586 4 жыл бұрын
Great work. Thanks for taking the time to make such a clear, informative video.
@Edrinnga 7 жыл бұрын
Very comprehensive
@JunkyDIYguy 7 жыл бұрын
Thanks man,,,
@Mr.Tiger.2013 4 жыл бұрын
646 dislikes jealous of this great video. Thanks for making it. One comment: I wouldn't want to risk putting the meter there while the car is starting, the surge voltage could damage it.
@Davfon23 3 жыл бұрын
Absolutely worth watching. Thanks a lot. Keep the great work.
@JaceD4V1S88 6 ай бұрын
my alternator is on a 94 previa, recently the headlights, dash and dome light intermittently dim and brighten slowly like im flashing someone with my headlights but its very subtle but noticeable. been watching videos on how to replace some of this stuff myself as i cant buy a whole new alternator right now. very informative vid, thank you!
@wbudd 6 жыл бұрын
Wow, this was informative. Thank you and I'll be checking out your other videos! (:
@JunkyDIYguy 6 жыл бұрын
ha haa thanks,
@QuanTruong7 7 жыл бұрын
very informative as usual. almost 1k subs congrats in advance.. ;)
@JunkyDIYguy 7 жыл бұрын
Thanks buddy,,,
@cesaralexisvalenciamontano7861 3 жыл бұрын
Almost 1k dubs 3 years ago? And now, almost 200k! Nuts!!
@commando7707 4 жыл бұрын
I think my heart just grew two sizes larger to make room for Junky DIY guy.!!!!
@garylangley4502 5 жыл бұрын
Very well done. You give good information, and your video is very professional. 2 thumbs way up from San Diego. I did not know about the decoupler. I learned about repairing cars in the early 1970's and they did not have decouplers then. A lot of my cars were so old that they did not use an alternator, but a generator instead. That BMW alternator is outrageous!!
@JunkyDIYguy 5 жыл бұрын
European car parts are expensive in many parts of the world due to the reputation as luxury cars
@huanweili7699 5 жыл бұрын
I learned more information on here than in my Automotive class. Lol 👍👍👍👍
@TRCVLOGPH 6 жыл бұрын
great video🚗 thank you ☺☺☺
@Charliesvue Жыл бұрын
It is a long video however you put so much information in it and it’s very helpful
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