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95 Peterbuilt 379 electrical problems

Discussion in 'Peterbilt Forum' started by Truckertrucker39, Nov 2, 2018.

  1. Nov 2, 2018 #1
    Truckertrucker39

    Truckertrucker39 Bobtail Member

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    Sep 23, 2016
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    No dashlights no headlights no abs lights.when driving down the road the lights will flicker off and on.the circuit breaker that says tail will trip when I put the relay in that labeled marker..one of the wires that goes into the relay labeled marker get really hot.also this plug that I posted a picture get hot also.this plug goes the the headlight switch
     

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    Truckertrucker39, Nov 2, 2018
    Truckertrucker39, Nov 2, 2018
    #1
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  3. Nov 2, 2018 #2
    CousinVinny

    CousinVinny Medium Load Member

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    Likely you have a frayed wire behind the dash that is shorting out against something.
     
    CousinVinny, Nov 2, 2018
    CousinVinny, Nov 2, 2018
    #2
  4. Nov 2, 2018 #3
    stillwurkin

    stillwurkin Road Train Member

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    Dec 2, 2017
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    When the flickering and connections get hot..is your volt guage discharging? That would verify a short. Assuming trailer is disconnected mayby start unplugging things. Like tractor tail lights. Just 2 of them or do you have extra lights across the tail of trk? Has a previous owner wired on extra lights. Thats what i usually check first. Jerry rigged wiring, possibility grounding out.
     
    stillwurkin, Nov 2, 2018
    stillwurkin, Nov 2, 2018
    #3
  5. Nov 5, 2018 #4
    CousinVinny

    CousinVinny Medium Load Member

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    In the second photo I can see a butt splice and two different size zipties on the same wire bundle. This is where my money is.
     
    CousinVinny, Nov 5, 2018
    CousinVinny, Nov 5, 2018
    #4
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