Why might a 1997 Ford Aerostar's parking lights and dome light stay on when you use the key remote to lock it and the battery is continually dead?

My experience with this has been related to the door locks. You can try to lubricate the lock Mechanism and it usually cures the problem, However we have also seen it past that point and have had to replace the switch that I believe that is part of the lock. Try lubricated with a light spray first. It is a FORD problem, mine does it once in while. The dome light will drain the Battery. Good Luck