How Do Trailer Tail Lights Ground if Theres Only Two Wires

Question:

My trailer lights have only two wires. Each with two wires coming out of the lights. If I attach a ground wire to each light, which wire do I connect the ground wire to so I can connect it to the trailer?

asked by: WILLIA M

Expert Reply:

Thanks for sending a picture of your light assemblies. From that I can tell that you have lights that use the mounting hardware as the ground for the circuits. So the brown wire of the lights gets ran to the running lights and the yellow or green gets ran to the stop/turn circuits.

expert reply by: Jameson C