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1991 Chevy Beretta Alternator fuse blows

Tiny
KEVINJR007
  • MEMBER
  • 1991 CHEVROLET BERETTA
  • 6 CYL
  • FWD
  • MANUAL
  • 290,000 MILES
My alternator fuse keeps on blowing as soon as I turn the key. I replaced the Alternator. As soon as I turn the key, not to the "Start" but the Accessory position. I'm thinking it could be the starter? I've even used double the amperage ( 10 amp) fuse and it pops right away. Please help.
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Tuesday, June 16th, 2009 AT 1:07 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hello, with the alternator connector unplugged, does the fuse circuit still go to ground? You can use a testlight across the fuse terminals instead of the fuse.

You can run a B+ jumper from the battery post to the testlight, touch the testlight to the fuse terminal that goes to the alternator, with the connector unplugged, if the light comes on, I think the wiring circuit is shorted to ground, somewhere.
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Tuesday, June 16th, 2009 AT 1:45 PM

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