Power Locks
WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The power locking/unlocking feature requests all of the vehicle doors be locked or unlocked upon a customer request from any interior door lock control switch. Power locking and unlocking of the doors operates independently of the position of the ignition switch and vehicle speed. The power locking/unlocking feature locks all the doors when a lock request is provided from any door lock control switch. When the vehicle security module receives an unlock/lock command from any door lock control switch, the vehicle security module activates relays internal to the module to supply the correct voltage and grounds for the door lock actuators.