1999 Chevrolet Tahoe Electrical

HANNAGANC

MEMBER
1999 CHEVROLET TAHOE
5.7L
V8
4WD
AUTOMATIC
200,000 MILES

Shorted out the battery. I have replaced all of the cables, the mega fuse, fuel pump fuse, starter, and the battery. The truck will start but it runs rough. I left the brand new battery hooked up, when I came out the next morning the battery was completely dead, could this be a bad Altenatoer?

Saturday, August 1st, 2015 AT 2:59 PM

1 Reply

JDL

MECHANIC
16,098 POSTS

How did you short the battery? I hope you didn't hook it up backwards? Get the battery charged. I would check the amp draw, everything off. Usually shouldn't be more than 50 ma if that much, that is.050 amp not even a tenth of an amp. If the drain is too much, pull/replace fuses one at a time, when you pull the fuse on the problem circuit, the excess drain goes away, then you check everything on that fuse circuit.

Check for any lights left on, exterior--interior--under the hood, everywhere. Best time to check is in the dark.

If you think it is the alternator, take the bat terminal loose, just don't let short to anything. See if it helps?

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Saturday, August 1st, 2015 AT 3:24 PM