make sure you have a trigger voltage for the rear camera feeding the switch box. The rear camera has about a 2' lead and then the connector is going to be inside the rear cap of the coach. You can remove the camera and plug it into the switch box to test the cable. Good luck and keep us posted.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7