Trailer Tail Light Wiring Color Code. When making your repairs or hooking up your trailer you simply make sure these wires are running to the appropriate component as shown above. Purple backup reverse lights.
The minimum suggested wire size for a 4 way trailer plug is 18 gauge for the turn brake and running lights. There are pins for electric trailer brakes auxiliary power and reverse lights. Yellow left turn lights brakes.
Blue reverse lights.
If your looking at the connectors as shown above from left to right the color codes will be as follows. For a new 7 way trailer connector i recommend using the pollak black plastic 7 pole rv blade style trailer socket part pk12 707e because all you need to do is strip the jacket off the ends of the above wires and then insert them into the back terminals on this connector. Blue reverse lights. Green right turn lights brakes.
