After Installing New Wiring and LED Tail Lights Trailer Drivers Side Lights have Constant Power

Updated 07/07/2015 | Published 07/05/2015

Question:

I bought new led tail lights. Hooked up passenger side. Green to green brown to brown white to white. Went to driver side. Yellow to yellow brown to brown and whit to white. Drivers side only has constant power. No brake or signal. Passenger side is fine. Any thoughts? Thanks

asked by: Jeremy S

Expert Reply:

Constant power would seem to indicate a short. Make sure the wiring is not pinched or damaged anywhere on the trailer and fix as needed. All grounds should be attached to clean and corrosion free bare metal surfaces. You can also check the trailer and vehicle side connectors for dirt/corrosion and clean them inside where the wires attach and on the pins.

I have included some links that may also help. One covers testing 4-Way wiring and the other is general information on trailer wiring.

expert reply by: Michael H