Hello Scotty, I have a 2001 Lincoln Navigator that I bought new and it has 60,000 miles on it. The Power Door Lock switch on the Driver's side Door will no longer lock any/all doors, however it will unlock all doors. I have already replaced the switch thinking possibly the contacts had gotten dirty, but that did not resolve the problem. If I use the Power Door Lock switch on the Passenger Door, it works fine for both locking and unlocking all doors. Any help would be greatly appreciated!!! Randy
Then I would assume the wiring going to the driver side door has a problem you open and close the door many times off in the wiring phrase between the door and the frame where it flexes
Thank You Scotty, many well wishes to you and yours!!! Thank You for the rapid response!!!