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95 379 Peterbuilt, no headlights, dashlights or running lights.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Truckertrucker39, Sep 8, 2018.

  1. Sep 8, 2018 #1
    Truckertrucker39

    Truckertrucker39 Bobtail Member

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    No headlights dashlights r running lights on this old truck.the circuit breaker for tail would trip every time I put a relay on markers.started taking the dashboard apart and moving some wires and the headlights came on.behinh the headlights switch is about 6 inches on wire that plugs into another set of wires and the ones behind the plug r getting hot.is the plug bad r is something still grounding out.included is a picture of the plug
     

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    Truckertrucker39, Sep 8, 2018
    Truckertrucker39, Sep 8, 2018
    #1
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  3. Sep 8, 2018 #2
    Oldironfan

    Oldironfan Road Train Member

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    Oldironfan, Sep 8, 2018
    Oldironfan, Sep 8, 2018
    #2
  4. Sep 8, 2018 #3
    Oldironfan

    Oldironfan Road Train Member

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    Wire broken?
     
    Oldironfan, Sep 8, 2018
    Oldironfan, Sep 8, 2018
    #3
  5. Sep 8, 2018 #4
    wore out

    wore out Numbered Classic

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    Look where the hood tilts, the wired will chaff and crack there. Usually if the head light switch is getting hot it's from a bad connection some where. The windshield on these trucks are bad to leak right on to the back of the fuse box. There could be an issue there. Being honest with that trucks age it could be any where.

    Headlights and tail lights are on the first switch. ICC lights and side lights are on the second one. The auxiliary light switch usually has the breather lights and under body trim lights
     
    wore out, Sep 8, 2018
    wore out, Sep 8, 2018
    #4
    SAR, spsauerland, BoxCarKidd and 1 other person Thank this.
  7. Sep 8, 2018 #5
    BoxCarKidd

    BoxCarKidd Road Train Member

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    And unplug the trailer cord from the truck.
     
    BoxCarKidd, Sep 8, 2018
    BoxCarKidd, Sep 8, 2018
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    spsauerland and wore out Thank this.
  8. Dec 5, 2018 #6
    Mississippi129

    Mississippi129 Bobtail Member

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    Dec 5, 2018
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    I’m having close to sane headache!
    My 94 model lights are flickering when I am on a rough road. Even with light switch off.
     
    Mississippi129, Dec 5, 2018
    Mississippi129, Dec 5, 2018
    #6
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