MaxxHaul 70205 12V LED Trailer Light Kit Wont Work When Headlights Are On

Question:

I installed Maxxhaul model 70205 lights. The break lights and turn signals work when the car lights are off but nothing works on the trailer when the car lights are on. Thanks,

asked by: Mike

Expert Reply:

The problem you described with your MaxxHaul 70205 12V LED Trailer Light Kit sounds like a ground issue. If the trailer connector and or the tail light grounds are not connected to a clean bare metal surface then when the headlights are turned on the extra amperage draw for the running lights will cause all sorts of lighting issues.

I would start by removing the ground wire at the trailer connector and cleaning up the connection point and re-securing it to the trailer frame. Next I would check the ground connection of the trailer lights. Usually they are grounded through the mounting bolts for the lights. Make sure that the connection is to a clean bare metal surface, if there is a plastic license plate holder on the drivers side, make sure that it is not inhibiting the lights ground. Finally if the trailer light mounting brackets are bolted to the trailer frame you should remove them and clean up that connection point also.

expert reply by: Conner L