Posted 16 March 2023 - 01:24 AM
Sounds like the lights were connected to the positive power wire coming from the truck somewhere. If you’ve had the camper for a while and it suddenly started doing this with no wiring change, my guess is it’s connected on the truck side of the camper’s charge control relay and for some reason that relay is stuck in the closed position so you now have the camper battery powering those lights. The camper’s silver battery switch position wouldn’t matter if this is the case. My guess is the actual connection may be within your pigtail to the truck connector. If your camper has running lights, it had a third wire. Someone probably didn’t want to deal with tying into the tail light circuit and got creative.
Edited by Jon R, 16 March 2023 - 01:32 AM.
Jon R
2021 Grandby Slide-in Front Dinette
2021 GMC 3500HD CC LB SRW Gas
1993 Chevrolet K2500 Ext Cab LB