I am replacing my long bed with a home built flat bed and I am looking for a "decoder" for the wiring harness that runs to the rear lights. I need to tap into the harness to wire my extra lights and am looking for what color wires do what functions. Anyone know of a chart out there that can help?

 

You can use this for the standard wiring colors.
Trailer Wiring Diagrams | etrailer.com

 

Here see if this helps.

 

Perfect! Thanks