Trailer Light Wiring Diagram 6 Wire. Be sure to check with your local laws in order to determine what is required for a lights. So here I have an older trailer which needed some work, along with re-wiring the lights.
Lights and Signals Before each tow, check the trailer taillights, stoplights, turn signals and any clearance lights for proper operation.
Here, we identify which color wire of the old plug corresponds to each function (lights, brakes, turn.
It's a green light that should flash once every time you put your signal light on (either direction). I have noticed that the PO installed a trailer brake extension and he hacked into the wires just inside the tailgate. We rigged up one dimmer switch in the front controlling a set of six lights, and another dimmer in the "bedroom" controlling two lights.