How to Change an Alternator : Diagnosing an Alternator Problem

25 Responses to “How to Change an Alternator : Diagnosing an Alternator Problem”

1. TYLERXISXKOOL says on: 23 February 2010 at 6:30 am

   my bright lights dont work on my car and also i have a apm in the back cuz of my car audio and i cant get power to the amp even tho my power cord goes straght to the batterie is it my alternator or a fuze
2. dennass331 says on: 23 February 2010 at 7:07 am

   hey alternators dont have commutators they have diodes commutators are used in generators and yea i think its bull we cant find brushes or new diodes to rebuild alternators at home it would be so much cheaper
3. LBGreenthumb says on: 23 February 2010 at 7:55 am

   possible bad grounding connection
4. lobextomy says on: 23 February 2010 at 8:12 am

   sounds like the wires are bad on the integra
5. Tyelow09 says on: 23 February 2010 at 8:40 am

   did you check all your fuses? in the fuse box under the hood?
6. maycor1076 says on: 23 February 2010 at 9:20 am

   although this is one easy way this is not an accurate way to test. the best way is to do a voltage drop from the battry to the alternator with load on in this case vehicl cranking or starting. Test light are not good enough way because it does not show voltage. Another way to test and alternator is to test it with an scope ampmeter.
7. munteanuioan says on: 23 February 2010 at 10:09 am

   my batery was gone.i conect it to another abtery startr the engine walk 30 km and now the alternator smokes .i have a volvo 440 wtf???
8. felixlee2009 says on: 23 February 2010 at 10:39 am

   my integra…new alternator n battery still same problem car lights in dash goes out n car stall when jump it start up but dies again…can any one help
9. raymondx1232 says on: 23 February 2010 at 10:58 am

   what is the name of the last part that you ware touching near the fuel injectors can’t see it on film
10. cjdistheman1 says on: 23 February 2010 at 11:19 am

    datz really wat i meant
11. skillz03784 says on: 23 February 2010 at 12:11 pm

    @cjdistheman1
    don’t disconnect the positive, disconnect the negative
12. dnl5649 says on: 23 February 2010 at 12:29 pm

    if you cant find brushes of the right kind.
    file down similar brushes with a bastard file to make them fit.
    works for me every time.
13. cjdistheman1 says on: 23 February 2010 at 12:52 pm

    you know wat i do. after i jump my car off i disconnect the positive wire from the battery while my car is already running. If its not running stilll then i know its time to take my ass to autozone etc.
14. aerospaceace10 says on: 23 February 2010 at 1:38 pm

    my alternator is FUCKED
15. Nicksolo85 says on: 23 February 2010 at 2:32 pm

    I have a question

    This morning, I tried starting up my car and it wouldn’t [all I heard was the noise when you try to start a car and it struggles and ended up not starting]

    I went and got Fuel Injector and 50-50 Coolant [as a just in case situation]. I borrowed another car.

    When I got home, I tried it again and the car struggled a bit and started right up.

    What could any of this mean?

    Is it possible I just needed new Coolant?

    Thanks in advance
16. windycityking1 says on: 23 February 2010 at 3:02 pm

    u cant hook ohmmeters uup to the battery u fool u’ll blow out the meter.. LTI wat up!!!!!!
17. YouEatTurds says on: 23 February 2010 at 3:08 pm

    is it possible for my battery to be dead but still have my dome/head lights functioning properly? i just jumped my car even though my lights all worked and everything was fine until the next day i put the key in and NOTHING. i jumped the battery again and it’ll probably be dead again soon. i’m worried it could be something worse than just the battery because of the functioning lights because i thought that if it were the battery i shouldn’t have any electricity at all. any thoughts?
18. bass1134 says on: 23 February 2010 at 3:59 pm

    seems like you have some knowledge on altenators… ok after replacing a knock sensor and wired everything up, my dads ranger started to shake and die. the funny thing is that we unplugged the small connection on the altenator (i believe its called the regulator) and run just fine! of course it ain’t charging the batt. any ideas? short somewhere?
19. superbird520 says on: 23 February 2010 at 4:10 pm

    i have had to change my alternator a week ago… i found that starting the car (even with jumpers) then seeing if it stays on while disconnecting the battery tells if if the alternator is the problem. thankfully most fords make it easy to change the alternator.
20. 302GTS says on: 23 February 2010 at 4:57 pm

    Checking voltage of the battery won’t always tell you everything… You need to also check the amperage of your electrical system. You can be putting out 13V, but possibly not the correct amps, and that can cause issues.
21. shoot9ball says on: 23 February 2010 at 5:51 pm

    hook a dam ohm meter up to the battery and rev the engine. simple stuff
22. Tboom123 says on: 23 February 2010 at 6:34 pm

    you spelled elipse wrong. lol just kidding…i’m just screwing around. i just think it’s funny that everyone tries to correct everyone else, but then makes mistakes on their own comment. even i mispelled exclamation. lol and np222, go smoke a joint, BUD
23. crayonchristian says on: 23 February 2010 at 6:35 pm

    im not correcting anyone im just reacting to what np222 said… (<– elise) hahaha. don’t worry no hating here! (<— exclamation point)
24. usmcgrosso says on: 23 February 2010 at 7:33 pm

    if u guys are soooooo smart then why do u watch his videos??? u already no it all.
25. daveskatesallday says on: 23 February 2010 at 8:11 pm

    expert village all of their videos suck

    from skateboarding tricks to car stuff

    *shakes head*

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