http://www.cjponyparts.com/door-lock...79-1993/p/LDA/

Door Lock Actuator for all 1979-1993 Mustangs with Power Door Locks.

Door lock actuator failure is a common problem for older Fox Mustangs. If you're door locks are stuck and nothing happens when you hit the lock or unlock button, your actuator is most likely faulty.

This is a universal type door lock actuator which will include several different rods to suit many applications. You will need to use the shortest rod that comes with it.

Check out other Door Lock Components for your 1979-1993 Mustang:
http://www.cjponyparts.com/1979-1993...ts/c/20020170/