Reverse light issue

Discussion in 'Electrical & Audio' started by Darth Plasma, Nov 6, 2018.

  1. Darth Plasma

    Darth Plasma Junior Member

    Posts:
    9
    Likes Received:
    2
    Joined:
    Sep 6, 2018
    Location:
    Pennsylvania
    First Name:
    Nathan
    Truck Year:
    1987
    Truck Model:
    V10 (K10)
    Engine Size:
    350 V8
    My 87 K10 has aftermarket brake lights and a set of really old reverse light/license plate lights and I took the bed off yesterday to discover that the reverse lights aren't even hooked up. There's just plugs for it, and I looked around a bit and couldn't find the other end to plug into it. I have no idea how to hook them up and im obviously gonna need them for inspection. Should I somehow make a wire for them? How would I do that? Or should I buy aftermarket reverse lights/find stock reverse lights
     
  2. chengny

    chengny Full Access Member

    Posts:
    3,775
    Likes Received:
    579
    Joined:
    Feb 22, 2012
    Location:
    NH
    First Name:
    Jerry
    Truck Year:
    1986
    Truck Model:
    K3500
    Engine Size:
    350/5.7

    Look along the inside of the LH frame rail and you will find a hard plastic tube that runs like this:
    HPIM1808.jpg

    HPIM2376.jpg

    Obviously, yours wont be wire tied to the top of the cross member, but it will terminate with a 4 pin socket like this:

    HPIM2719.jpg

    It (the socket half of the plug) should be somewhere behind the bumper:

    HPIM1715.jpg

    One of the female pin connectors will be connected to a LT GRN wire. That is the power supply for the B/U lights. Without knowing more about the situation, that's about all the help I can offer.
     
  3. Darth Plasma

    Darth Plasma Junior Member

    Posts:
    9
    Likes Received:
    2
    Joined:
    Sep 6, 2018
    Location:
    Pennsylvania
    First Name:
    Nathan
    Truck Year:
    1987
    Truck Model:
    V10 (K10)
    Engine Size:
    350 V8

    Thanks for this info, I'll take a closer look.
     
  4. Darth Plasma

    Darth Plasma Junior Member

    Posts:
    9
    Likes Received:
    2
    Joined:
    Sep 6, 2018
    Location:
    Pennsylvania
    First Name:
    Nathan
    Truck Year:
    1987
    Truck Model:
    V10 (K10)
    Engine Size:
    350 V8
    Another related question, I'm swapping out a cab and I need to transfer out the fusebox and all the wiring to the new cab, and I know theres a big box with all the wires coming out from the fusebox (I think?). So is that like a plug that I can unplug that whole wiring harness, or would I have to remove the fusebox/wiring box as a whole? I'm still a beginner at this.
     
  5. Turbolover

    Turbolover Junior Member

    Posts:
    5
    Likes Received:
    2
    Joined:
    May 24, 2016
    Location:
    Idaho
    First Name:
    Charlie
    Truck Year:
    1988
    Truck Model:
    C30
    Engine Size:
    454
    You should be able to remove a screw from the engine bay side of the fusebox and that will allow you to unplug the wiring harnesses.
    there should be one for the front lights, another for engine controls and one for the rear lights/fuel tank.
     

Share This Page