Headlight and all clearance lights on. Can’t turn off. Hazard button blinking.

Discussion in 'Freightliner Forum' started by Tcbtowing, Aug 23, 2024.

  1. Tcbtowing

    Tcbtowing Bobtail Member

    19
    2
    Dec 3, 2018
    0
    2013 freightliner cascadia sleeper tandem axle.
    DD15 manual transmission

    Hello, I am having a difficult time diagnosing this electrical issue. Starting from the beginning.
    First truck would loose all power to the cab. The truck would still run but nothing would work inside the cab. No A/C no power Windows nothing on the dash working. All exterior lights would turn on and I could not control them. I would mess with the wires outside on the Sam cab and it would go back to normal. All dash lights would work. Did this three times. I then switched the PNDL box. Nothing changed continued having the same problem.

    The fourth time when I tried to move the ground and positive cables going to Sam cab. All lights inside worked. But exterior lights all stayed on. I noticed the Hazard button started blinking or flashing and hasn’t stopped. I turn off truck outside lights still stay on and hazard blinking.

    I’ve checked all fuses. I disconnected batteries for an entire day. I changed out the SAM cab everything continues the same. I pulled out hazard button and checked wiring on all switches on the dash and the buttons in the sleeper.
    I am waiting on the hazard button module to come in to change it out and see if that fixes the problem. Is there anything else? I don’t know what else to do. I have the error codes attached. IMG_8043.jpeg
     
    RedDirt Thanks this.
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