How Should 4-Way Round Vehicle End PK11404 Be Wired

Question:

I know the green is right turn, yellow is left turn, brown is tail/park, and white is ground. How should I wire up my four wire round, which wire should go at 2 oclock, and so on.

asked by: Leon D

Expert Reply:

If you are towing a vehicle with a motor home the 4-way round connections inside the vehicle end are usually as follows:

Top left: Yellow wire, Left turn and brake function.
Bottom left: White wire, ground wire.
Top right: Green wire, right turn and brake function.
Bottom right: Brown wire, tail light function.

There is not an industry standard wiring diagram for the 4-Way Round vehicle end, part # PK11404, so you may need to use a circuit tester, part # PTW2993 if needed, to check which pins are performing which function on your trailer and connect the corresponding wires on the vehicle connector.