This switch is at my doorway mounted on a cabinet that has electronics in it (DVD, Satellite). I bought the RV used (2016 model year) and the prior owner was not much help telling me the features of the RV.
I can't speak for your unit, but those types of switches are used for lights in my Wildcat. It MAY power a light which has an ON/OFF switch on the fixture which may explain why you see no change when you flip it.