Hi all. I usually am in the TH section but a buddy is having a problem so thought I'd asks the experts here. He just bought a 2007 Fleetwood Revolution and we can get the front and outside TVs to work...
You can check the selector box by disconnecting the " antenna in " cable and the cable out to the rear tv and connect them together. Could be a bad cable in the wall somewhere. Hook a new cable to the rear tv connection and run it to the rear tv. Or just connect your front tv to the selector box rear tv connection. That will also test your selector box.