Door Lock

The lock is built into the latch assembly which, as I recall, is held onto the rear of the door with three T25 torx screws. First I would remove the door trim panel and check for any linkages that may have been popped loose. Also look for any that were bent or deformed. That could, in effect, be holding the handle partly pulled which could prevent the lock part from working.

If they're okay, you might consider removing the assembly from a car in the salvage yard first so you know what is involved. You can play with that one to see how it is supposed to work.

Caradiodoc