loose ignition connections
I agree that a bad or worn ignition switch could be the cause of these intermittent problems. However, I don't think the overhead fans would be controlled by the chassis ignition. The camera system also would most likely not be on a chassis circuit. You did not mention how old your coach is, but a worn ignition switch could certainly cause the issues you describe. Jiggling the switch is a good suggestion to help zero in on the cause.
__________________
|