door lock sensor

[tnb121562]

1997 Boxster, the indicator light on the door lock swith sometimes comes on even when doors locked and stays on when you unlock the doors, is there a sensor attached to the door lock mechanisims? Also, when this happen the auto window level adjustment when the top is up doesn't work, the windows do not move down the 1/4 to 1/2 inch until the doors are shut and then close tight. This is not a new problem with this car, I bought it about two weeks ago with 29k, but there are rub marks on the top if the window and the plastic molding on the top where the window hits when the door is shut. Is this a common problema and is anyone aware of which sensor needs to be replaced?

Thanks Tom