Door Lock Control Switch
WARNING: This page is about a different car, the 2016 Ford Transit Connect. However, it is still accessible from the selected car via links, so may be relevant.
The door lock control switches are single pole, double throw switches. They are supplied voltage signals from the BCM for the lock and unlock requests.
When a switch is pressed to lock or unlock, the corresponding input circuit is routed to ground, indicating a request to lock or unlock the doors.