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1999chevy Tahoe electrical problem?

Tiny
CHEVTAHOE99
  • MEMBER
  • 1999 CHEVROLET TAHOE
Electrical problem
1999 Chevy Tahoe V8 Four Wheel Drive Automatic

I own a 1999 chevrolet tahoe and I just recently noticed that while sitting at a stop or while in park, that if I turn on the rear defrost my battery ampage drops. I was told by a few people it was more than likely a bad ground somewhere, others told me bad alternator, and some said that its the ENTIRE wiring system and that my wires needed replaced. Can anyone help me I dont have the means to pay for extensive car repairs so im asking to see if I can get a straight answer
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Tuesday, March 23rd, 2010 AT 8:08 AM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Have you used a meter to see exactly what voltage you still have at the battery when it is on? The rear defrost is purely electric, it will cause a draw on the system, that is normal. You need to be sure that the alt can keep up with it when you are sitting at idle, if so I wouldnt worry about it.
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Monday, April 26th, 2010 AT 10:19 PM

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