I have the same problem with my 97 Mountaineer on the rear driver's side door. I've noticed it gets jammed every time my 7 year old son tries to open the door without the door being unlocked.
The first time it happened I tore the door apart from inside the truck, a difficult feat since I had to remove the back seat to get into it. I was able to manually jiggle the link for the lock that combined with alternating the electric locks between locked and unlocked freed it up.
The second time it happened I got a little perturbed and started beating on the outside of the door on and just below the handle while I was alternating the power locks and low and behold it was enough to free the lock.
To this day I still use this method when the problem occurs and I still haven't tried to find a permanent solution since I don't drive this vehicle except for bad weather or utility purposes.
If you find out how to fix it please let me know.
Tuesday, January 27th, 2009 AT 12:13 PM