ELECTRICAL

2000 Chevrolet Blazer

Tiny

wadedavid

May, 2, 2013 AT 6:19 AM

With engine running my battery warning light illuminates and the voltage indicator drops to 9 instead of normal 14 and will stay this way for sometimes a few seconds to sometimes a few minutes and will then slowly rise back to normal and battery light goes off. I suspect a bad alternator but need further assistance because its erratic or intermittent. Thank you.

FOUND 1792 RELATED QUESTIONS

Why Is My Battery Light On?

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Gen Light

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1 Answer

Tiny

KHLow2008

May, 2, 2013 AT 6:44 AM

Symptoms indicates a failing alternator. The carbon brushes are worn resulting in intermittent contact.
When problem occurs, tap the alternator with a hammer and if the charging goes back to normal, that would confirm the alternator is bad.

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