keep blowing backup light fuse - Automotive Wiring and Electrical


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Curtis
Novice

Mar 12, 2006, 8:09 PM

Post #1 of 4 (3139 views)

keep blowing backup light fuse	Sign In

I have a 93 GMC 1/2 ton and I keep blowing the fuse for the signal and backup lights, I have managed to narrow the problem down to the backup light not the signal lights because every time I put it in reverse the fuse blows. I have checked all the wiring under the truck for shorts but I cannot find any, I have tryed slightly bigger fuses and nothing seems to work. I am all out of ideas. Anyone got any ideas

Curtis

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 12, 2006, 9:08 PM

Post #2 of 4 (3130 views)

Re: keep blowing backup light fuse	Sign In

PLEASE don't use higher amp fuses.!!!!!! You probably have a bad socket for back up lights and if you take one bulb out at at time with a fistfull of fuses you should find which one. T

Curtis
Novice

Mar 13, 2006, 3:37 PM

Post #3 of 4 (3127 views)

Re: keep blowing backup light fuse	Sign In

I'm starting to loose my mind, i tryed your suggestion and i think i narrowed it down to the right side. I took out the right bulb and put it in gear and it blew a fuse, so then i took out the left bulb and put in the right and it worked fine. BUT then i got thinking and noticed that the bulbs were slightly different and figured i what the heck and tryed switching the bulbs and then everything was working fine. both sides came on i tryed every combination, applying the brake while in reverse while signalling... everything. everything worked fine, so i put everything back together and go to back out of the shop and the fuse blows again. Do you think it could still be a faulty socket? and just works when it wants to kinda thing.

Curtis

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 13, 2006, 7:26 PM

Post #4 of 4 (3126 views)

Re: keep blowing backup light fuse	Sign In

"You ARE starting to lose your mind!" ?? When you find mine out there I'd like it back

From here I think you should look hard at the sockets and especially with a truck you may need to chase wires for faults. Trailer hitch wiring can be part of this. I'm not sure what else to suggest but await your success story. T

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