Bed/Brake Light wire location

[Bill-W]

Does anyone know where the wire harness for the bed light on my 88 ext cab runs down into the cab?

I picked up a brake /bed light combo from a c4c truck a few weeks back at the junkyard for a few bucks and got it cut in and mounted but now I need to wire in the brake light signal. I just don't feel like tearing my whole inside out looking for it. I guess I should have looked at one in the junkyard before I left, oops.

I was going to wire it off the signal to my brake controller as I have the factory pigtail wired into the controller and I figured it would be an easy please to get the signal from without the flasher signals.

Here's some pictures of the new one installed:

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Any help / advice would be greatly appreciated.

 

[franklin2]

If your truck has it, it's going to be in the wiring running under the driver's side sill plate on top of the rocker. It will be a lightgreen wire. The wires for the domelight, map lights, and seatbelt warning switches run in there as well.