[Kathmandu]

There is an overload relay somewhere in the car that disconnects the motor when it reaches either the up or down limit. (battery saver switch) it could be a position switch in a 91, not sure. I have a similar problem but I have no idea where this might be located because it isn't in the door.

I suspect it may be in the trunk on the driverside fender on mine where the lock control relays are and the security system.