I just thought I would let you guys know of a issue I have had with several air doors on IC school Buses. If you run into a issue with the lights activating but your entry door will not open. Go above the entry door and open the access panel. Look for the air door actuator. There you will find a jumper harness in between the main harness and the actuator. It has a male female plug. On both buses I have had issues with the resister wire has broken off the plug. In a pinch simple unplug the harness and do away with the resister harness. Then repair the harness on your free time.