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Clearance light

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

  1. Mar 28, 2022 #1
    Ilyalis1993

    Ilyalis1993 Bobtail Member

    11
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    Jan 8, 2022
    0
    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
     
    Ilyalis1993, Mar 28, 2022
    Ilyalis1993, Mar 28, 2022
    #1
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  3. Mar 29, 2022 #2
    Rideandrepair

    Rideandrepair Road Train Member

    16,523
    53,937
    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.
     
    Rideandrepair, Mar 29, 2022
    Rideandrepair, Mar 29, 2022
    #2
    Ilyalis1993 Thanks this.
  4. Mar 29, 2022 #3
    Ilyalis1993

    Ilyalis1993 Bobtail Member

    11
    7
    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?
     
    Ilyalis1993, Mar 29, 2022
    Ilyalis1993, Mar 29, 2022
    #3
    Rideandrepair Thanks this.
  5. Mar 29, 2022 #4
    kranky1

    kranky1 Road Train Member

    2,253
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    Sep 16, 2015
    Ontario, Canada
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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.
     
    kranky1, Mar 29, 2022
    kranky1, Mar 29, 2022
    #4
    Rideandrepair Thanks this.
  7. Mar 29, 2022 #5
    kranky1

    kranky1 Road Train Member

    2,253
    8,843
    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.
     
    kranky1, Mar 29, 2022
    kranky1, Mar 29, 2022
    #5
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