How about a '73 Overlander for comparison, too
Our '73 Overlander has two of the switches right by the door and another one further down the wall toward the front of the camper. The closest one to the door operates the exterior light over the door just like Airdog's. The one next to that operates the lights over the sink in the galley. The third one, closer to the front of the camper, operates the "scare light" on the outside of the camper. Got a multi-meter? Pretty easy to test 'em with one of those. Expect that there may be corrosion on the fixtures and possibly even at the switch itself. Good afternoon project for you all.