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2000 Chevy S-10 voltage indicater

Tiny
MIKELOWTHER
  • MEMBER
  • 2000 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • MANUAL
  • 136,000 MILES
My problem started a few weeks ago when a friend asked me to jump start his car. The next evening, I noticed my voltage gauge dropping when at idol and rising with throttle. I replaced the battery thinking that it wasnt holding much of a charge. The problem continued so I took it in to a very reputable auto shop. They tested it and found no problem. Said maybe there was a problem with my gauge. Well today I noticed that the gauge is reading as low as 8 volts and does not rise with throttle. The low battery indicator light comes on as well. Although it has no problem running, I am worried that I will be left stranded. Any suggestions will be appreciated.

ML
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Friday, July 18th, 2008 AT 4:24 PM

2 Replies

Tiny
SWILLIAMS
  • MECHANIC
  • 597 POSTS
Might be a bad diode in the alternator. Start the engine and test for AC voltage at the battery. Or pull the alternator and take it in for testing. I would also test the voltmeter circuit with a known voltage.
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Saturday, July 19th, 2008 AT 2:13 PM
Tiny
MIKELOWTHER
  • MEMBER
  • 2 POSTS
Thanks for the reply. I actually got stranded soon after writing this post. I called the shop that told me nothing is wrong and they sent a tow. They said my altenator was bad and charged me through the nose to replace it. Unfortunately I had no other option.

Thanks again
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Tuesday, July 22nd, 2008 AT 10:42 AM

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