How Does Trailer Lighting with Black and Red Wire Attach to Standard Trailer Wiring Colors

Updated 04/14/2020 | Published 04/12/2020

Question:

I need to know what wires go to the red and what wires go to blk such as yel and brn to red or to blk

asked by: Brooks

Expert Reply:

For most trailer lighting applications the if the light has a red and black wire the red wire represents the stop and turn circuit and the black represents the running light circuit. If there isn't an additional white wire that would indicate that the assembly grounds through the mounting hardware.

So to wire this to standard trailer wiring you'd run the red wire on the assembly on the passenger side of the trailer to the green wire and the red wire on the driver side of the trailer to the yellow wire. The brown wire of the trailer wiring would run to the brown wire on both sides of the trailer.

expert reply by: Jameson C