7 Pin Trailer Wiring Harness. You should be able to easily find a Curt harness that plugs into that pig tail and give you the required wiring plug for your trailer. I'm thinking of picking up the above mentioned parts as well as the factory trailer brake controler.
I drew this crude diagram to help explain. After tracing wires, the trailer was fine, problem was on the Jeep itself. Verify the harness color codes at each tail light.
Please help Identify what these wire's control.
There should be a common color for both the tail lights.
Cut the four-pin plug off of the trailer harness. The left and right turn signal lights should each have a different color. Trailer harness splitter Towing My tow rig, the weight, and the wind of not great conditions - Read Sumo Springs Review.