ford lock actuator

Remove the door trim panel, use a trim panel tool and go slow so you don't break the retainers on the inside of the panel. Here is a guide that will help

https://www.2carpros.com/articles/door-panel-removal

The lock actuator is the latch so here is a diagrams to help you replace the latch.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers