How to Repair Your Own Alternator (With Simple Tools)

How to Repair Your Own Alternator (With Simple Tools)

About the Author: Michael Flood

100 Comments

  1. Before i replace my alternator what should else should i check? im thinking my cheap battery might have killed the one I have but it has had 190,000 through it.

  2. شــُـكـرً لــّـك
    Chris :
    ،Thank you very much
    Very Excellent Lesson.
    Keep Up.
    I benefited very much from your instructions,
    so thank you again and again.
    I’m very grateful for you
    An Arab, Engineer.

  3. Would it be possible for him to go further? Instead of buying that part could he just solder the wire that was disconnected?

  4. Mrs. E here, Thank you! My Dad left me an amazing shop and tools, so there are ladies in the audience. You help me carry on the DIY spirit. A firm Texas handshake to you!

  5. hey Chris, I hope you see this soon, I have a 2007 Honda Pilot, and the continuity test is good, as well as the reverse one where you switch the test leads…. however when I do the test where you put a screw driver, the alternator pulley does not move on either direction, aka locked up. I opened it up and checked the brushes and the copper rod where you were checking resistance and it is good too, only problem is that it is locked up with the screwdriver inside, with no screwdriver it is very smooth in both directions. the pulley doesn't look sophisticated and I am wondering how it works on this car, or what could be wrong. any help appreciated

  6. Great vid. Very informative. I used to just get a new alternator, now, I'm going to save some money! Thank you very very much!

  7. Thanks a bunch. I was looking for how to open mine and see the problem, already got a replacement (used) but started making a humming noise and stalling/ dragging the engin when idle.

  8. Thank you so much I just replaced my alternator myself, I didn't even think of repairing the old one I gave it in for a core. I think the problem inside mine was the clutch from the loud squeal I smell I was experiencing. "subscribing"!

  9. Good info Chris. During the first part of the video the alternator was off screen. I would like to suggest using a tripod instead of a camera mounted to your head. Thanks.

  10. Chris, My restoration has stalled as I cannot even take the four long screws out that holds the alternator together.

  11. bloody good, mate! starters, alternators are very easy to repair. but. i think they intimidate somewhat. I had one i repaired for two dollars one time. all it needed was the brush end, bearing. wholesale distributor right up the street. only two dollars. wallah!

  12. Chris, in your opinion, is an oem remanufactured alternator worth buying over a new oem one for replacement on a 98 honda accord with 110000 miles on it? Thanks in advance!

  13. I have an 83 diesel ranger with the same oil pump on the back of the alternator. Will this be the same taking apart/fixing as this one? Also if anybody has a diesel ranger out there with some tips let me know please!

  14. Great vid , great step by step and easy to understand , but at the end of the day , the bone yard has a pile of good ones for 40 bucks each.

  15. Ive been working on my 1995 fiat barchetta over the winter. I had the battery removed and after charging and connecting before i even turned the ignition on, smoke puffed up from alternator area. Now battery light will not go off on dash !
    I can only think that some fluid has dripped down into it and caused problem.
    Do u have any idea if its a simple fix or a new alt ??

  16. Could you help me with an issue I have on my 1997 Fiat Ducato Alternator, it's a MAGNETI MARELLI, my van is a motorhome. The reading at the starter battery was 13.28V and roughly the same on the habitation battery, with the engine running at idle. I tried disconnecting the leisure battery and voltage went up a bit to 13.49V, I have checked all the wiring, also done a voltage drop, checked the earths etc. Took a reading with my multimeter directly from the alternator with engine running and got the same reading 13.49V. Nothing like 14V which I was expecting. Is this a fault with the VR??

  17. I love videos like this I stupidly left my rav4 into Toyota to get a new throttle body sensor fitted they charged me €300 euros for the sensor I coulda got it online for $25 dollars and they charged me €300 euros to fit it my own mechanic woulda charged me €45 the job was that easy I coulda done it myself!! very well informed video!

  18. can you make a video showing what they do with the old alternator you give for a core refund? What causes them to go bad? Why do alternators have brushes? Ac motors are brush less and can generate ac power.

  19. great tutorial thankyou. I'm not a mechanic but dad was a royal engineer and I'm a scientific engineer but love my project cars.

  20. I am curious, couldn't you have just resoldered the original part without replacement? Thanks

  21. same problem as mine, i ordered an entire assembly to replace" no doubt your a good mechanic sir!

  22. I didn't know that Rodney from Only fools and horses has knowledge of alternator repair!Good work man!I'm bug fan of Only fools and horses but this channel is also cool!

  23. Just ordered a brand new alternator for my F150. But I think I'll keep the old one and try this rebuild. It might come in handy if/when this new one ever goes out

  24. Hey Chris, nice video. I'm an amateur mechanic but a professional electronic technician. As such it was a nice tip you mentioned silver solder.

    But out of curiosity, was it not possible for you to make a mechanical connection and then solder those wires down yourself onto what was left of the original diode assembly?

  25. awesome. gave me hope. I can not find a alternator for my car any where looked and looked so great video.

  26. Thanks for the dismantle that alternator , have you ever thought about doing a video on producing AC power out the back of the alternator from beginning to end connecting the three wires to the stater out the back cover hooking up the few transformers you need from what I can figure out 12V to 240V out of each wire off the stater you have 110 AC volts three wires what I can see 330 V AC power into transformers connected to easy generator plug into your home fuse box ! Back up power in case of electrical failure in what I see they say out of each alternator out the back is 90 Amps , 2 Alternators = about 600W @ 180 Amps – off you’re electrical company they provide 250W @ 240 Amps

  27. I have not seen anyone rebuild an alternator since the mid 70's. Didn't know you could even get the parts. Thanks.

  28. Good video, real mechanics fix parts such as alternators, they don't exchange them for a dubiously rebuilt one at a car parts store.

  29. Wtf why are these things built so cheap, broken solder points? This is in a moving vehicle. You should be able to roll the thing down a large hill and have it work fine afterwards.

  30. Hey Chris,great video,I just subscribed,my local electric repair shop used to rebuild the alternator's,but now say to just through away and buy a new one,I believe he don't make enough money with it ,so they just tell me that,not doing me any service? What do you say?Where do I get parts to do the job my self? Thanks

  31. Great job I'm looking through the web to see if I can find one of a MKX Lincoln alternator but it'd be the same or similar to it?

  32. You do have females watching love well done catching and correcting yourself, my mothers a Mechanical Engineer who is designing off shore wind turbines and I'm here learning how to fix my jeep cheers for the content magical being. X

  33. Just done mine the bushes were covered in crap cleaned them off and wiped the copper junctions down touchwood it's OK. But taking it off I now have a slight leak of power steering fluid bloody Citroën Berlingo

  34. Pretty cool, but for most cars you can pick up a used working alternator for not much more than the parts cost to repair it so not really worth it unless you have a rare type of alternator that’s expensive to replace

  35. Excellent excellent video Chris. I wanted to check that I had done my alternator rebuild correctly. The only bits I didn't properly check were the resistances with my meter. Unfortunately it's now back in the car. My only feedback is that the video was a wee bit blury when you were showing where the solder was meant to be. That was all. Again, Excellent video.

  36. My car's battery dosen't charge while engine is started and head lights on,on other time when i turn off the head lights and accelerate the engine,then the battery is charging.this issue only comes while lights are on…can you explain this to me,why this happens..car is a toyota corolla dx wagon…

  37. Outstanding work! Not only well-videographed, with good audio and lighting, but the narration is smooth and the information beyond compare. I subscribed immediately.

  38. Thank you for the video. Finally someone who repairs the problem instead of replacing the entire alternator. Great work and very detailed instructions. Saved $300 US.

  39. اصلان کارت قشنگ نیست..اشتباه باز کردی..فولکش میخاد..دینام خراب میکنی. عزیزام .بلد نیست ی نکن.مرسی.

Leave a Reply

Your email address will not be published. Required fields are marked *