How to replace Volvo VNL 780 worklight

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Dantheboss, Aug 16, 2022.

  1. Dantheboss

    Dantheboss Bobtail Member

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    Aug 16, 2022
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    Hello all,

    Having some issues with my rear facing work lights. My passenger side work light stopped working. I can't seem to find the connector inside the cab to replace the light. I have a direct replacement from the dealer, it has a connector that connects inside the cab. Does anyone know how to replace this light? The procedure? Does the interior cabin panels have to be removed to reach the connector? I have no idea how to do it.

    Any help would be amazing, thanks guys.
     

    Attached Files:

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  3. boneebone

    boneebone Road Train Member

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    If the work light stopped working, it’s usually because the incandescent bulb burned out.

    You can purchase a new PAR 36 bulb and just replace the bulb.

    You can use a small flat bladed screwdriver to pry the old bulb out of the rubber housing, disconnect the two leads and reconnect the new leads on the new bulb and pop the bulb back into the rubber housing.
     
  4. Dantheboss

    Dantheboss Bobtail Member

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    Aug 16, 2022
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    ####, I already ended up ruining the original light housing during removal as it was stuck, and I figured I had the replacement. I have the new replacement OEM housing, with sealed bulb, which has a connector and rubber grommet that runs through the rear of the cab, but I can not find where this connector goes so I can connect it inside the cab itself. I looks easy to change, just a standard plastic, but again the issue is I can not locate where it goes in the back of the cab. Do you have any idea where to location this connector back there?
     
  5. Dantheboss

    Dantheboss Bobtail Member

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    Aug 16, 2022
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    please see these attached pictures. This is the assembly I need to change. It has it's own connector that runs inside the back and the black rubber grommet seals the hole. On the inside, I can't seem to find where to plug this in. Hopefully someone has an idea please. thank you!
     

    Attached Files:

  6. AModelCat

    AModelCat Road Train Member

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    Honestly I'd probably just splice in a waterproof connector on the outside and call it a day.
     
  7. boneebone

    boneebone Road Train Member

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    Most likely the wiring is behind the back of the bunk wall upholstery, which means you’re going to have to carefully remove certain sections to find where the wiring lead is.

    The best thing to go is find a Volvo dealership that has its own body shop and ask them where the lead is, as they know how and where all the wiring is run inside the cab.
     
  8. lilillill

    lilillill Sarcasm... it's not just for breakfast

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    Take one of the speaker plates out (if it's like mine, there is no actual speaker, it's just a cover), that should allow you to reach around behind the panel to feel for any wiring. There is a thin white insulation blanket behind there too, which you may have to cut a hole in so you can get your hand through.
     
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