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Exterior Lighting help for 2007 Volvo VNM

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Passerthrough, Apr 5, 2021.

  1. Apr 5, 2021 #1
    Passerthrough

    Passerthrough Bobtail Member

    2
    1
    Apr 5, 2021
    0
    I am having an exterior lighting issue with a 2007 Volvo VNM.
    VIN: 4V4MC9GF47N480942
    Engine: D12
    Trans: Eaton manual
    1.Using the light switch, when I turn on the parking lights they work. But when I turn it to headlights, the parking lights go out and headlights do not turn on.
    2. Signal lights do not work RH or LH.
    3. Headlights will come on only when bright light lever is pulled and held.
    4. Hazard lights do work.
    Could you help me figure this out?

    What I have tried and tested so far:
    1. replaced LCM and had Volvo program.
    2. Tested wiring from cab pass through to headlights. All power and grounds check good.
    3. Replaced lighting switch.
    4. Checked J-Pro for codes. No codes.
    5. Checked all LCM fuses. Good.

    Thank you
     
    Passerthrough, Apr 5, 2021
    Passerthrough, Apr 5, 2021
    #1
    Johny41 Thanks this.
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  3. Apr 6, 2021 #2
    Johny41

    Johny41 Road Train Member

    1,192
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    Feb 10, 2011
    Ontario, Canada
    0
    I've just came inside, still dirty hands ,i tried to fix a similar problem on my 2010 Volvo, fog light don't work after replacing harness, speed sensor on and off glitch, first axle differential temp doesn't work, i believe i'll have to replace the whole chassis harness, about 1400$ parts only.
    If you have corrosion on this connector going into cab modules could cause problems with Volvo.
     
    Johny41, Apr 6, 2021
    Johny41, Apr 6, 2021
    #2
  4. Apr 7, 2021 #3
    Passerthrough

    Passerthrough Bobtail Member

    2
    1
    Apr 5, 2021
    0
    Hello. Thank you for responding to my question. That is very good insight and information. Also that video is great. I plan to look into the issue more today. I will check the things you mentioned.
     
    Passerthrough, Apr 7, 2021
    Passerthrough, Apr 7, 2021
    #3
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