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Kenworth blinker problems

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Caleb14, Jul 4, 2023.

  1. Jul 4, 2023 #1
    Caleb14

    Caleb14 Bobtail Member

    1
    0
    Jul 4, 2023
    0
    I have a 2013 Kenworth T800 having blinker issues. All of the lights work on truck and trailer when turned on or brakes are applied, and all the left side blinkers work. But on the right side my front blinker on the steer wheel fender works but the blinker on the back of the tractor and trailer do not flash. I don’t think a bad ground is an issue cause all my lights still work and I’ve checked all the fuses that run any sort of light and they’re all good. I can’t find any broken wires so I was thinking maybe it was a bad Turn Stalk module but when I tore the dash off I can’t find the TSM for the life of me. I don’t know where to go from here now.
     
    Caleb14, Jul 4, 2023
    Caleb14, Jul 4, 2023
    #1
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  3. Jul 4, 2023 #2
    JB7

    JB7 Medium Load Member

    648
    900
    Dec 13, 2022
    Laurel, MD
    0
    There is a Chassis Node that all the lights run through. Should be on the left frame rail near the fuel tank. Has three 21 pin connectors. Pricey part runs about 2k new, used part a bit less but also pricey.
    Need some basic electrical skills to see if there is a signal going into the node and if the signal is coming out of the node. There should be 2 harnesses coming out of the node to the back of the tractor.
    Unplug the trailer lights/cord and see what the right rear turn signal on the tractor does.
     

    Attached Files:

    Last edited: Jul 4, 2023
    JB7, Jul 4, 2023
    JB7, Jul 4, 2023
    #2
    spsauerland and bjytech Thank this.
  4. Jul 6, 2023 #3
    spsauerland

    spsauerland Road Train Member

    4,296
    10,886
    May 31, 2010
    West Harrison, In
    0
    Broken/corroded wire most likely. Last six of VIN and I can help with diagram and finding it.
     
    spsauerland, Jul 6, 2023
    spsauerland, Jul 6, 2023
    #3
  5. Feb 11, 2024 #4
    TexasTruck24

    TexasTruck24 Bobtail Member

    2
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    Feb 11, 2024
    0
    I have a 2020 T680 with same right turn signal not working on the tractor. All other lights work except left front high beam do you have any insight. Thanks Mark
     
    TexasTruck24, Feb 11, 2024
    TexasTruck24, Feb 11, 2024
    #4
  7. Feb 9, 2025 #5
    VDH Farms

    VDH Farms Bobtail Member

    1
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    Feb 9, 2025
    0
    I have a 2009 T800 that I am having issues with the hazards not working but the turn signals all do. Have been chasing down the wires to the best of my abilities without a wiring diagram. Believe my module is bad. Only thing I haven't been able to find is where the power wire from my hazard switch goes. Have found that the ground from hazard switch goes to the module and is functioning. Can anyone help me with issue or have wiring diagram?
     
    VDH Farms, Feb 9, 2025
    VDH Farms, Feb 9, 2025
    #5
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