1997 GMC Jimmy battery

1997 GMC JIMMY
127,000 MILES • 6 CYL • 4WD • AUTOMATIC
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DREW1985
  • MEMBER
  • 1 POST
my car battery has not stayed charged i went to auto zone and they tested it and said it was good.checked my dome lights,my alarm has never gave me any problems i didnt even turn on my alarm and my battery is still dead.my power door locks and power seats dont work.please help me?
May 21, 2008 at 12:02 PM
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D29
  • MEMBER
  • 3 POSTS
I've had the same problem for 3 years now and my mechanic still can't find anything wrong. Have you ever figured out the problem?
Nov 26, 2008 at 1:33 PM
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SWILLIAMS
  • CERTIFIED EXPERT
  • 597 POSTS
Could be a bad diode in the alternator.

To test for current drain disconnect the negative side of the battery and connect an amp meter between the battery and the cable. Read what the meter says. Anything over 1/2 amp draw after 20 minutes means you have a current leak. Then you just start pulling fuses till the draw stops. Then you ferret out the problem by using a good wiring diagram.
Nov 27, 2008 at 6:13 PM
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