I searched all the threads and read all I could to understand what the problem could be why my auto door lock on the driver door doesn't work. It started a few weeks ago intermittently where sometimes the driver door would not lock when I pushed the key fob or maybe didn't unlock. Even the button on the inside did not always work. However using the key in the lock always works. Now it has stopped altogether. Like everyone else I can't buy just the actuator and I too have had prices from $500 to $1500 for the parts. I took my door apart and everything mechanically works fine. The latches, handles and cables are all firm, no loose or slack cables. When I use the key fob to unlock the door I hear a faint sound from the DDM as if it is trying to do something. Is the actuator inside the DDM ? or is the actuator part of the door latch assembly (the part that mates with the large peg on the car body when the door closes). I need to know if anyone knows which part needs to be replaced. The part number on my DDM is 1W4T-13C791-AA but is not on the Team Ford website. Any help would be appreciated as I do not want to purchase the whole door guts for $1500 just to fix this problem.