Light/electric problem

1999 Fld120
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.

 

The trailer wire was replaced couple years ago. The old wire wasn't pulled out. It's pushed to the bottom of box.

I did disconnect the trailer feed. The trailer side and rear marker lights (brown and black) lugs are live even with the light switch turned off.

 

Light switch has 6 poles. 2 bottom control headlights and marker.
2 center my guess power in.
2 upper just marker lights.

I had constant power to both center pins.of harness to switch.

Yesterday I ran thru a lot of rain.
This morning I put everything back the way it was.
All the lights seem to work properly and that relay stopped buzzing. Except if I turn just marker lights on. Trailer lights stay on, when I turn switch off.
If I turn switch up for marker lights and headlights then off, all the lights go off.

I know there's power feeding the system somewhere. I'm in Miami going to Fargo. I hope everything dries out before I get there.
Thanks for the replies.