Thanks for the help guys!
@joeblack5: that is the self destruct button.
LOL that's just too funny!
In gutting the bus for the last couple of weeks I think I figured out what it does.
Absolutely nothing. The doors "were" air operated, but I had an emergency release valve above the doors that allowed them to be opened manually by releasing the air pressure. When I started tearing out the associated air valves and cylinders above the door, it looks as though alot of it was jerry-rigged from some sort of repair. There was welding to door frames, disconnected wires and switches, and other parts that looked out of place. I tried flipping the switch several times but nothing ever happened, so I think it's safe to assume it was disconnected at some point and I can remove it!
......for all the help!