Clearance light

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Ilyalis1993, Mar 28, 2022.

  1. Ilyalis1993

    Ilyalis1993 Bobtail Member

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    Jan 8, 2022
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    Hey guys , got 07 379 got a wire proble, when running my clearance lights my battery level will go down to 12.5 and stay there if I Hood I’m the curtesy light button and keep the lights off amp gushed will go up and battery will go back to 14v . My tail light on my tractor was flickering the other day could that be eating power? Fuse will blow eventually btw. Just want to see if anyone had this before I get into the wiresz
     
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  3. Rideandrepair

    Rideandrepair Road Train Member

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    Aug 8, 2015
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    Tail light on Tractor, should be easy to figure out. Hot touching ground somewhere back there. I’ve fixed mine a couple/few times over the years. Starting at the bad light, working your way back. Bad wire or ground will probably be visible. Test light helps.
     
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  4. Ilyalis1993

    Ilyalis1993 Bobtail Member

    9
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    Jan 8, 2022
    0

    I checked them all they are all good not it. It seems when I turn my headlight switch that’s when it happens, but after a while it only blows the clearance lights fuse. I’m assuming maybe one of the lights in the trailer?
     
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  5. kranky1

    kranky1 Road Train Member

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    Unplug the trailer and see what happens. If the truck is ok then the problem is in the trailer. I would think you’re looking for a dead short, a bare wire or some water somewhere. I don’t know how else you would get an LED lamp to draw enough to trip a breaker or burn a fuse.
     
    Rideandrepair Thanks this.
  6. kranky1

    kranky1 Road Train Member

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    Sep 16, 2015
    Ontario, Canada
    0
    Unplug the trailer and see what happens. If the truck is ok then the problem is in the trailer. I would think you’re looking for a dead short, a bare wire or some water somewhere. I don’t know how else you would get an LED lamp to draw enough to trip a breaker or burn a fuse.
     
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