What Are The Functions Of The Red, Black, And White Wires On Older Trailer Tail Lights
Updated 04/21/2021 | Published 04/17/2021
Question:
We received our trailer lights and the colors on the new lights are different from the light removed. The old lights are white, red. black . The new is white, brown green. How do I install?
asked by: Debi
Expert Reply:
It is likely that the functions of your old trailer lights are that the red wire is the turn signal/brake light, black wire is running lights, and the white wire is the ground but I recommend double checking this by using a circuit tester like # PTW2993 with your trailer connected to your tow vehicle and each function on one at a time.
To install your new light you will connect the ground wire to the white wire, the turn signal/brake light wire to the green wire and the running light wire to the brown wire.
I included a link to a helpful article on trailer wiring for you to take a look at.
