I was standing beside my truck, it was turned off. The trailer lights just turned on.
I had been parked a couple hours. I haven't noticed the before.
I checked my wiring connections from trailer to main panel. My brown and black circuits are live. Also my dash lights stay on.
No other truck lights come on unless I turn the switch on for them. All turn signals and brake lights work normal.
I pulled the relay and the trailer circuits stay on.
The relay buzzes when I put it in, I tried with a different relay, same result. Trailer and dash lights stay on with this relay removed.
I'll try any suggestions in the morning.
Thanks for any help.