Door Multiplex Control Unit
Turn ignition off. Remove driver's door trim panel enough to gain access to door multiplex control unit connector. Disconnect door multiplex control unit Blue 20-pin connector. Inspect connectors and terminals. Check for bent, loose or corroded terminals. Repair connector terminals as necessary and retest system. Perform driver's door multiplex control unit input tests. See Fig 1 . Repair as necessary and recheck system operation. If input tests are okay, replace power window master switch (door control unit).