I looked through the service manual for the wiring diagram and couldnt find it to decipher these. Obviously, the black "grnd" wire is ground. But which of the other wires are parking lights and which one is brake lights. I'm trying to wire my shell into the existing wires and I have the hardware to do it but I dont know which one of these wires is which.

 

Run a couple jumper wires from a 12v power source. Ground the ground and touch the other two one at time. Wich ever is brighter will be the brake light. If it's wires from the truck use a test light. Push in the brake, or turn on the park lights. The test light should light according to each function.

 

Black/yellow = parking lights. Green/red = brake light/turn signal.