2017 579 Headlight/ turn signal issues.

Discussion in 'Peterbilt Forum' started by slim1978, Feb 2, 2023.

  1. Feb 2, 2023 #1
    slim1978

    slim1978 Bobtail Member

    3
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    Sep 18, 2017
    0
    Right hood signal bulb blew. Replaced with new. No power to signal wire at headlight.
    Left low beam went out shortly after. No power to low beam light.
    I'm wondering about the chassis node? Not sure which plugs to check tho.

    All fuses are fine. Even replaced all fuses involved just to be sure
     
    slim1978, Feb 2, 2023
    slim1978, Feb 2, 2023
    #1
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  3. Feb 2, 2023 #2
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    romulus,mi
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    If it is only left low beam that is not working and you have checked power wire and ground wires for the entire run length from hood to node, that might indicate that you are missing 12v+ on pin A4 of chassis node plug. It is under cab below driver floor board. Having ESA software would confirm this.
     
    QUALITYTRUCK, Feb 2, 2023
    QUALITYTRUCK, Feb 2, 2023
    #2
  4. Feb 2, 2023 #3
    slim1978

    slim1978 Bobtail Member

    3
    0
    Sep 18, 2017
    0
    Right signal doesn't flash either. Running light on that side works tho.
    Thanks for the info. Might have to take it to the stealership.
     
    slim1978, Feb 2, 2023
    slim1978, Feb 2, 2023
    #3
  5. Feb 13, 2023 #4
    vak0008

    vak0008 Bobtail Member

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    Feb 13, 2023
    0
    Hi all. peterbilt 579 2023. which fuse is responsible for the rear dimensions of the trailer? Only the sides light up.
     
    vak0008, Feb 13, 2023
    vak0008, Feb 13, 2023
    #4
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