One way to Locate Electrical Short..

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jetman

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Joined
Dec 26, 2012
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Location
Minnie, AK
First Name
Don
Truck Year
1980
Truck Model
c10
Engine Size
5.0
So my turn/brake/emergency lights started blowing fuses due to a short in the wiring harness. I was working my way thru the 2nd box of fuses, trying different things. Decided to "jumper in" an old car horn where the 15 amp turn signal fuse goes.

Right turn signal, faint honking in time with the blinker, right side bulbs lighting up as they should.
Left turn signal, LOUD honking in time with the blinker, NO left side bulbs lighting up. (Short located on left side turn signal circuit...)
Started working my way up and down the bundles of left turn signal wiring along firewall and under truck gently bumping wiring, horn went from LOUD to faint honking, kept bumping wires till tiny insulation abrasion was found.

Total time to locate electrical short, 10 minutes! :)
 

foamypirate

Full Access Member
Joined
Jul 30, 2010
Posts
3,302
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Location
Central TX
First Name
Jake (Mr. Wilson)
Truck Year
1980
Truck Model
El Camino, baby!
Engine Size
5.3L/4L60E
So my turn/brake/emergency lights started blowing fuses due to a short in the wiring harness. I was working my way thru the 2nd box of fuses, trying different things. Decided to "jumper in" an old car horn where the 15 amp turn signal fuse goes.

Right turn signal, faint honking in time with the blinker, right side bulbs lighting up as they should.
Left turn signal, LOUD honking in time with the blinker, NO left side bulbs lighting up. (Short located on left side turn signal circuit...)
Started working my way up and down the bundles of left turn signal wiring along firewall and under truck gently bumping wiring, horn went from LOUD to faint honking, kept bumping wires till tiny insulation abrasion was found.

Total time to locate electrical short, 10 minutes! :)

That's one way to do it! I like it, haha.:cheers:
 

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