Help us understand. The camper is fine, all lights work. The tow vehicle, (we call then toads) is fine, all lights work. Put them together and the lights on the toad don't work?
It's in the wiring between the tow vehicle and the toad. Don't know how it got broke, or who fixed it, but that is where it is. Process of elimination.
2012 Ford F250 ext. Cab 4x4
2002 Jeep Wrangler Sahara
2008 Yamaha V-Star 650 Classic
2008 Work and Play 18LT