Question about 2000 GMC New Sierra 1500

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1992 turn signal fuse blowing

Fuse on turn signal and back up light (15 amp) keeps blowing when I turn on the ignition switch. What started this problem is a short that melted the fuse so it appears I have a grounding problem. I replaced the turn signal switch under the steering wheel but still the fuse blows. I think it might be the back up switch on the wire to the transmission back up module but do not know what wires they are. No obvious wires melted on the main control box on firewall or on the back of the fuse panel. Need help looking for a short or some kind or some direction to look for. Thanks

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  • KBUGG Nov 28, 2008

    I have a 93 olds royal 88 with 24000 miles TURN SIGNAL FUSE SHOOTS WHEN HEAD LIGHTS ARE TURNED ON. HAZZARD LIGHT DONT WORK AT ALL.EVEN WITH GOOD FUSE.

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Check the flasher unit, the transmission module unit should ground the backup lights, so I don't think its that. installed any new electronics or drilled any holes?

Posted on Mar 13, 2013

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Have you checked if the globes are shorted?

Posted on Sep 14, 2008

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Under the dash just left of the steering wheel. fixurupr_7.jpg
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fixurupr_6.jpg
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Here is the diagram you were looking for, hope this helps :)
fixurupr_4.jpg fixurupr_5.jpg

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