That was a suggestion a friend made as well, however, the ground is attached to a wall. So I either have to find a way to ground it behind the wall, or leave it grounded where it is and find a way to cover it up.
However, after much pouring over my electrical schematic provided by Thomas, it appears this Vandalock system may actually ground a wire from the chassis that causes the no start condition (if my understanding of the relay is correct). It appears pin 30 of the relay is connected to ground, and pin 5 from connector J6 on board 1 is connected to ground via pin 87a on the relay. In the relay, pin 87a is connected to 30 at all times until the ground signal from the rear door vandalock switch is completed (in this case, the door is UNLOCKED), at which time, pin 5 of J6 is disconnected from ground and allows the bus to start. I think, anyways. I will find out later, as I plan to pull the yellow wire out of J6 on pin 5 and see if I can start the bus with the vandalock connection in the rear not connected to ground.