Identifying Older Trailer's Taillight Wiring Colors to Install New Lights

Question:

I have a 1971 aristocrat starliner camper with driver side wire colors red black green. My new led lights are brown yellow. Passenger side green brown yellow. Led light colors green and brown. What goes where

asked by: DERIK J

Expert Reply:

Your older trailer's wiring uses a non-standard wiring color code which means you'll need to use a circuit tester like part # PTW2993 to confirm what circuit each wire color carries. Connect the trailer to vehicle wiring and apply the different circuits and then test each of the wires with the circuit tester.

On the new trailer lights white will be ground (if not present the light grounds through the mounting hardware), solid brown is trailer taillights (or if green/brown in your description is one wire that's for the running lights on right side), green by itself would be right stop/turn, and yellow by itself left turn/stop.

I attached a link to a page that has trailer wiring diagrams for this for you to check out as well.

expert reply by: Jameson C