1996 Chevy Blazer battery

1996 CHEVROLET BLAZER
10,400 MILES • 6 CYL • 4WD • AUTOMATIC
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OMNF
  • MEMBER
  • 2 POSTS
have trouble starting car in morning. battery seems to have drain off during night. went to check battery terminals and when I remove the negitive side it spark. left it disconnected and put a light across the negitive post to the negitive cable and the light came on.
Jan 2, 2009 at 8:53 PM
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BUDDYCRAIGG
  • ✓ASE Certified Mechanic
  • 2,262 POSTS
  • ASE Certified Mechanic
ok. you're light proves you have a power drain.

leave the light hooked up between the cable and the battery and start pulling every fuse out until the light goes off.

then research that circuit.
Jan 2, 2009 at 9:03 PM
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OMNF
  • MEMBER
  • 2 POSTS
pulled all fuses inside and the only one that did anything was the park lights. Dim a little but the light did not go out
Jan 2, 2009 at 10:14 PM
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BUDDYCRAIGG
  • ✓ASE Certified Mechanic
  • 2,262 POSTS
  • ASE Certified Mechanic
now you have to start unplugging stuff.

i have seen some alternators do this. the bridge rectifier shorts and the windings have power going through them when the engine is off.
Jan 2, 2009 at 10:24 PM
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