My switcher was directly behind the head unit. There are a bunch of threads on problems with the camera, mainly the rear, with Grayhawks and at least one thread that has bunches of info on the switcher and connections. Some of us changed out the head unit and went through that mess.
Also, Jayco did a junk job of wiring and many, and I mean many had the camera wires that run near the emergency brake, cut by application of the brake. One or two had the wire "clipped" which causes shorts with the cameras.
Basically this is a case of doing some research to determine what your problems in and then likely pulling the dash to get to the wires and it will be a MESS of wires but with what we have right now, we do not know what the real issues is.