There is a small lever located on the latch mechanism on the side closest to the door skin. In order for the door latch to unlock, this lever must return to a position toward the interior of the vehicle. This is normally done with a small spring in the door latch mechanism that is most likely broken. You can reach around the latch and press this lever with your finger and the door will then unlock and open so you can reach the screws that attach the latch mechanism to the door. I have a '97 with the same problem. The only fix is to replace the latch mechanism. The cost is about $28 at any local Ford dealer. Removing the latch mechanism is quite a task due to the many rods attached to it from the handle/lock mechanisms.


Good luck,
Larry