My '91 Nissan Maxima is acting very strange.  The passenger power
window goes down on its own.  If I hold up switch, the window stays.
When I shut off the car, the window stays closed for a moment, but
then I hear a click sound come from the passenger door (near the
passenger window switch), and the window goes down again.  Other
times, when I shut the car off, the window goes down immediately and I
can't roll it up again until I hear that click sound.  Something else
odd.  If I do get the window up and then shut the car off, as soon as
I shut my door when I get out, the passenger window goes down again.

Another issue that may be related is that the passenger power door
lock will go down, but the switch won't make the door lock go up.  The
dealership said it's either the master switch on the drivers side
door, or the door lock actuator.

If the problem is the master switch on the drivers door, is it
possible that when the vehicle is off, the switch could be sending a
signal to the passenger window to roll down, causing the click sound
inside the passenger door?

Scott