I had my 2023 3500 into the shop because the rear backup camera went black. The service tec tracked it down to a loose connection. A few days later, I picked up my 5th wheel, plugged into the 7 pin and chose 5th wheel gooseneck on the RAM prompt. When I parked the RV and disconnected the 7 pin, the rear back up screen was black again. I tried shutting down the truck and restarting, but it did not work. The following day, the camera worked. Is there a procedure I need to do to tell the truck there is no trailer anymore?