My battery is always running down.

SIMMONSJH113

MEMBER
2004 CHEVROLET SILVERADO
V8
2WD
AUTOMATIC
49,000 MILES

My battery is always running down. Have had Battery and Alt checked they are good. I have used a test light and have a definite power draw. Have pulled all visible fuses and circuit breakers but I still cannot find problem. IS there more fuses? If so where are they?

4 Replies

DOCFIXIT

MECHANIC
18,828 POSTS

So when you put test light in series with batt term and batt it lights? If yes you got a big drain. If all is so try disconnecting the B+ to alt. Light goes out then alt diodes out defective. Here are eht fuse panels in the diagrams below.

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Thursday, May 13th, 2021 AT 6:34 PM

SIMMONSJH113

MEMBER
3 POSTS

I went back and pulled alt. Wire and light stayed on. I went so far as disconnecting alt. Completly with no change. I rechecked all fuses and breakers with no change. I have double checked everything being turned off? What can I be missing?

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Thursday, May 13th, 2021 AT 6:34 PM

DOCFIXIT

MECHANIC
18,828 POSTS

Need a DVOM digital volt ohm meter placed in series with neg. Batt term. Set on 10 amp scale. Are you pulling relays a large amp fuses in engine compartment?

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Thursday, May 13th, 2021 AT 6:34 PM

SIMMONSJH113