Installing Prodigy P3 Brake Controller on 2007 Holiday Rambler Endeavor RV

Question:

Not sure which wires I am supposed to connect to. Wires to plug behind Panel have 2 red and 2 black. Found the white and blue .

asked by: Tim L

Expert Reply:

I can help you determine what the wiring functions are on your Holiday Rambler Endeavor but we don't have a way to identify them just based on the colors you listed. Using a circuit tester like part # PTW2993 probe the wires for voltage. The wire with voltage all the time is for the black wire of the controller, the wire that has voltage only when you apply the RV brakes is for the red wire. Now ground the tester to the constant 12-volt power wire, then probe the remaining two wires. The wire that lights the tester will be the ground and goes to white wire of the brake controller wiring, the other will be the brake output circuit and would run to the blue wire.

expert reply by: Jameson C