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Why wont alternator charge?

Tiny
JOYMARSHALL
  • MEMBER
  • 2002 PONTIAC TRANS AM
  • 75,000 MILES
Engine light on, battery and alternator are new, found broken prong on pcm, replaced pcm, very frustrating, car still not charging, have checked fuses, does not seem to have an alternator fuse. Help!
Saturday, October 6th, 2012 AT 7:20 PM

4 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,922 POSTS
Does the battery warning light turn on when you turn the ignition switch to "run"? If it does, does it turn off when the engine is running? Do you have a digital voltmeter and know how to use it?
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Saturday, October 6th, 2012 AT 7:46 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Engine Light on means a fault has been detected by the engine management system. Did you check for trouble codes?

Why do you think it is the alternator that is not charging?
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Saturday, October 6th, 2012 AT 8:07 PM
Tiny
JOYMARSHALL
  • MEMBER
  • 2 POSTS
I very much appreciate your quick response, but as I was typing my question my husband found a broken wire going to the alternator and repaired it which fixed my charging problem. Again, thank you
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Saturday, October 6th, 2012 AT 9:47 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You're welcome. Glad to know the problem has been fixed.
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Saturday, October 6th, 2012 AT 10:04 PM

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