I looked at the schematic again. The organization of the FSM is frustrating--I find it hard to find anything. Your problem is most likely a diode which enables the driver's door switch to activate the alarm and also turn on the light. The other switches are connected directly to the light. I remember some conversations about the diode in another make vehicle. In that one, and probably in yours, the diode was located in the dome light fixture. Check it out and let us know what you find.