[DutchmenSport]

Ok, now that you've identified the fuse, you could simply drill a small hole all the way through to the inside of your camper, directly behind the camera so you don't have drill an additional hole on the outside skin.

Splice one wire, both ends now, through that hole, and simply attach a toggle switch inside the camper.

Looing at photos of your make and model, you could put a simple toggle switch directly above the rear window, trim it out so it looks like it belong, and then you wouldn't have to do a lot of rewiring.

You'll have to remove the camera when you do this, so get a flashlight and look into the hole where the wire comes through and make sure you are not hitting a wall framing stud. You could start with a very, very fine drill, go all the way through the wall to the interior of the camper, and then see from the inside exactly where it came through. If the position is not right for a switch right there, you then, at least, have a path to get the wire inside the coach you can place it wherever you want.

If you are pleased with the location, then drill the hole a little bigger from the inside, big enough the wire can come through. Drilling from the inside will keep the surface of the wall paneling and wall paper from scaring up.

If the location is not good, then you just have one tiny hole on the inside of your camper wall to put a dab of goo or a putty, or a matching drop of colored caulking, smooth it out, and the spot will be so tiny, it will never be noticed by anyone but you.

Well, it's just a suggestion for the path of least resistance.

Good luck.