I have a Keystone Travel Trailer 321RES. On my 1,500 mile drive home from Texas, I noticed the flood lights on the front and the light on the front right side were on.
Step 1) I checked the switch on the panel and it was in the off position. I flipped in on and off a few times, but no change.
Step 2) I went to the fuse box and pulled the fuse that was marked for that set of lights, but nothing changed.
Step 3) Seeing if the fuse box was mislabeled, I pulled all the fuses. Still the lights are on.
Step 4) I used the battery disconnect switch. Still nothing.
Step 5) I disconnected the trailer from the truck. Still nothing (now I am also wondering if the battery disconnect switch is there but not connected) I have not physically disconnected the battery from the trailer as I know that will turn off the lights.
I have plugged in the trailer to AC now so as not to drain the batteries.
Step 6: I am posting this thread.