1990 Lincoln Continental door panel contorl panel

I would start by inspecting the wires that pass from the door into the car body, if you dont know how to remove the rubber protector, use a razor on the bottom side and slice it open to reveal the wires, you will find wires that have broken in half! Splice them back together solder and shrink wrap them if you can, if not get some butt connectos and crimp them back together. Match up the colors and you will be OK.

Master Switch (Continental) Remove switch from vehicle. Test with a self-powered test light or ohmmeter. With switch in NEUTRAL position, there should be continuity between terminals No. 1, 2, 3, 4, 5, 6, 7, 8 and 9 and terminals No. 10 and 11. 1. Press raised portion of rocker switch (closed position). Continuity should exist between terminals No. 1, 2, 4, 6 and 8 and terminals 3, 5, 7, 9, 10 and 11. 2. Press depressed portion of rocker switch (open position). Continuity should exist between terminals No. 1, 3, 5, 7 and 9 and terminals 2, 4, 6, 8, 10 and 11. 3. Depress lock-out switch to detent position. Terminal No. 10 should not have continuity with any other terminal. See Fig. 4 . If switch does not test as described, replace switch. 4. Page 1 of 1 POWER WINDOWS -1990 Lincoln Continental 5/6/2009
May be a stuck relay too.
POWER WINDOW RELAY Removal & Installation (Crown Victoria, Grand Marquis, Mark VII & Town Car) Disconnect battery ground. Locate relay in right lower pillar, behind right hand kick panel. Disconnect relay connector and remove retaining screw. Remove relay. To install, reverse removal procedure. Removal & Installation (All Other Models) Disconnect battery ground. Remove screw attaching relay to left reinforcement to brake pedal support. Disconnect wires from relay and remove. To install, reverse removal procedure. Page 1 of 1 POWER WINDOWS -1990 Lincoln Continental 5/6/2009