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Brake light switch for 1999 Grand Prix

Tiny
JOEMAC82
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
My 1999 Grand Prix 3100 continues to blow the fuse related to the brake lamps. I disconnected the brake lamp switch, took it apart, and it seems to all be working fine. I tested each individual wire from the wiring harnesses and no fuse tripped. I put them back in, depressed the brake and the fuse blew again. Any suggestions?
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Thursday, December 30th, 2010 AT 8:02 PM

4 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Your looking at a power wire shorted to ground I think you are looking in the wrong place looking at the switch. Do you have a multimeter we could try to narrow it down with that.
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Thursday, December 30th, 2010 AT 8:09 PM
Tiny
JOEMAC82
  • MEMBER
  • 3 POSTS
I don't have a multimeter. Would a test light help at all?
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Thursday, December 30th, 2010 AT 8:31 PM
Tiny
JOEMAC82
  • MEMBER
  • 3 POSTS
Im working on getting a multimeter right now. I will get back to you as soon as I do. Thank you so much.
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Thursday, December 30th, 2010 AT 8:44 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Let me know a test light would work but would be a lot harder to use because you would have to hook one end to power to test for a short to ground. Let me know when you get the meter.
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Thursday, December 30th, 2010 AT 8:58 PM

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