Although the switch tree is certainly problematic, from the symptoms, my money is on a solenoid being shorted or the wiring from the relay board to the solenoids being compromised.I don't think it is anything in the locks or doors since the fuse that is blowing is in the 120vac circuit and not in the 150vdc circuit. As for stopping before the floor, that may be either solenoids or contacts on the various relays. We have never been told whether the fuse blows as you take off or if it blows 3" above the floor. Also, we still don't know how he gets the car above the bottom floor to experience the problems at the second floor. Above the bottom floor and below the top floor, the switch tree only provides continuity for the valve circuitry. I believe that he has stated that the car seems to run almost normally between the floors. High speed does not come into play unless you are leaving the floor from actual floor level.
