2004 Peterbilt 379 braking/turn signal issue

Discussion in 'Peterbilt Forum' started by Lunchbox714, Nov 7, 2021.

  1. Lunchbox714

    Lunchbox714 Bobtail Member

    6
    0
    Apr 8, 2018
    0
    Everytime I step on the brakes the front passenger side turn signal and on the dash turn signal lights up solid. this only happens when the truck is charged with air. when truck has no air like in the mornings, I step on the brakes peddle and nothing lights up
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Don379

    Don379 Heavy Load Member

    714
    1,277
    Jan 7, 2021
    0
    regardless. that junction box at rear of truck is nasty and corroded. grounds are all f'.ed up.
    https://www.amazon.com/MICTUNING-Wa...t=&hvlocphy=9007357&hvtargid=pla-759801914040
     
  4. lester

    lester Road Train Member

    2,110
    5,022
    Jan 2, 2012
    NW, Iowa
    0
    That's a good idea and I'm kinda mad I didn't think of it. Every year my rear S/T/T harness gets shorter and shorter.
     
  5. Don379

    Don379 Heavy Load Member

    714
    1,277
    Jan 7, 2021
    0
    If your going to make the day out of it, get rid of all the old wires as well and run this duplex wire or triplex if you need 3 wire.
    https://www.amazon.com/Duplex-Tinned-Marine-Wire-Black/dp/B00MI52TA4

    To add new pigtails to lights, don’t bother using junk connectors ore solder iron. Watch a YouTube video on how to use these and then for added protection slide a shrink tube over them. You will have made yourself years of trouble free service.

    https://www.amazon.com/dp/B089D5GD4...=8g63u&ref_=sbx_be_s_sparkle_mcd_asin_1_title
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted