Here's a mystery for you guys (and gals).
Our 2001 Deville DHS has developed an oddity. The door window, behind the driver's seat will not go up or down when the door is closed by operating either the switch on the driver's door or the rear passenger's door. Open the door and it works.
My thought is an open ground circuit and an alternate method of the open door, causing the interior lights to come on is also providing the circuit to ground for the power windows circuit.
So, where do I look for the problem and the cure?