door wont lock, help?

My guess is the power door lock actuator is frozen up and wont go up or down even with the key.You could try taking the door panel off and remove the linkage from the actuator to lock the door i think that will work.
 
Agreed. You might have to cut the actuator arm to get it out of there (depending upon how it froze). You can go without an actuator (having manual door locks in essense) if needed.
 
just drill out the rivet on the door that holds the lock acutator in place and you will have a working manual lock on that door until you replace the actuator. i've done this on a couple foxes and it only takes a few mins.
 
Follow this link to fix your door lock actuator problems: Mustang Door Lock Actuator Retrofit

Stuck with door lock actuators that don't work and don't want to pay the $50+ for a new one? Tried the junkyard ones and found that they last six months and freeze up?

A new actuator for less than $5. Fix one side for $18, do both sides for only $25. I don't sell parts, I don’t make any money off of the upgrade, I just tell you how to do it cheaply and easily.

Here’s a picture of the new actuator installed:

actuator_install_in_door.jpg