I have the round style plug in. I have brake lights when I hit the brakes and reverse lights on trailer when I reverse but no running lights. Worked fine until today.
I have the round style plug in. I have brake lights when I hit the brakes and reverse lights on trailer when I reverse but no running lights. Worked fine until today.
Check trailer running light fuse, probably under the hood. If it's good, make sure you have power at the truck plug. If you do have power at the plug, probably a broke wire in the trailer circuit.
Glad you found it, but as tcesni said you may have a bare wire.
The issue should be on the circuit or the wiring of the Brown wire on the trailer. If you have the brake lights that usually means you do not have a ground issue.