Power Locks
WARNING: This page is about a different car, the 2009 Mercury Sable, 2009 Ford Taurus X, and 2009 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The SJB monitors the door lock control switches and Integrated Keyhead Transmitters (IKTs) . When the SJB receives a lock/unlock command from a door lock control switch or an IKT, the SJB energizes the appropriate lock or unlock relay to supply voltage to the door lock actuator circuit(s). The door lock actuator circuits are at ground through the SJB when the lock and unlock relays are not energized.