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Peterbilt 379 1996 Electrical issues

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jimtx77, Oct 1, 2017.

  1. Oct 1, 2017 #1
    jimtx77

    jimtx77 Bobtail Member

    38
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    Jul 31, 2011
    rafter77tx@gmail.com
    0
    My other rig is a 2002 KW T800 with 6nz cat So I am unfamilar with the dash on this pete. Just bought this truck, driving it home. N 14 celect Motor Head lights and top marker lights work as do turn signal, stop lamps and hazards No dash light fuse is good just not getting power thru it. I jumped it across from hot lead and dash lights right up. No Side running lights or rear lights come on . fuse is the push button kind and it is not popped.. Truck has factory chicken lights under cab and flat top sleeper Switches from left to right are Head lights, Cl LPs, Aux lights Load LP Fuel and Spot light. Turned them all on. Any ideas? I opened the dash panel everything looks plugged in.
     
    jimtx77, Oct 1, 2017
    jimtx77, Oct 1, 2017
    #1
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  3. Oct 1, 2017 #2
    jimtx77

    jimtx77 Bobtail Member

    38
    2
    Jul 31, 2011
    rafter77tx@gmail.com
    0
    I also tested the rear plug before the lights no power no reverse light
     
    jimtx77, Oct 1, 2017
    jimtx77, Oct 1, 2017
    #2
  4. Oct 1, 2017 #3
    blairandgretchen

    blairandgretchen Road Train Member

    13,377
    71,914
    Dec 9, 2011
    South west Missouri
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    Is there a round knob next to wiper knob, that is the dimmer switch - is it dimmed to nothing?
     
    blairandgretchen, Oct 1, 2017
    blairandgretchen, Oct 1, 2017
    #3
  5. Oct 1, 2017 #4
    jimtx77

    jimtx77 Bobtail Member

    38
    2
    Jul 31, 2011
    rafter77tx@gmail.com
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    Its all the way to the right
     
    jimtx77, Oct 1, 2017
    jimtx77, Oct 1, 2017
    #4
  7. Oct 1, 2017 #5
    blairandgretchen

    blairandgretchen Road Train Member

    13,377
    71,914
    Dec 9, 2011
    South west Missouri
    0
    I'm guessing the dash lights feed off the 2 left switches - headlights and clearance lights -

    Have you checked power in and out of those switches with a test light?
     
    blairandgretchen, Oct 1, 2017
    blairandgretchen, Oct 1, 2017
    #5
  8. Oct 2, 2017 #6
    Hogleg

    Hogleg Medium Load Member

    311
    258
    Nov 20, 2016
    Salem, Illinois
    0
    In how dash lights are lit, at least on my 359, one side of the headlights and one side of the clearance light switch are in parallel with either of them feeding the dash light rheostat. From there they daisy chain across the lights that are snapped into the gauges. There are wiring diagrams avail on the net. www.supermiller.com.
     
    Hogleg, Oct 2, 2017
    Hogleg, Oct 2, 2017
    #6
  9. Oct 5, 2017 #7
    jimtx77

    jimtx77 Bobtail Member

    38
    2
    Jul 31, 2011
    rafter77tx@gmail.com
    0
    The problem was in the fuse box, a bad connection in the back. Thanks for your responses
     
    jimtx77, Oct 5, 2017
    jimtx77, Oct 5, 2017
    #7
    Hogleg Thanks this.
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