Power Lock Switch
WARNING: This page is about a different car, the 2004 Dodge Dakota and 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
The DDM power lock switch circuitry is connected in series between ground and the driver door switch mux input of the Central Timer Module (CTM). Each power lock switch position (Lock, Unlock, and Neutral) provides a different resistance value to the CTM input, which allows the CTM to sense the switch position. Based upon the power lock switch input, the CTM controls the battery and ground feed outputs to the individual power lock motors to lock or unlock the door and liftgate latches.