So after having my slide in truck camper on for most of our short real summer (100) days I unloaded it in the driveway and today reinstalled the tailgate. This will be my third time on this truck. My neighbor helps me as it is heavy and awkward and we are old. The plug in is a bit of a pain but it’s our third time. Plugged it in hinges were in position cables connected . Tailgate was open closed but it will not open now.Camera works fine but no tailgate light as before . It will not open. I watched him plug the wires together. And checked them pushed in all the way . I started the truck no alarms or anything. Tailgate is stuck shut .