Power Door Lock Switch: Description and Operation

The power lock system can be controlled by a two way, momentary resistor multiplexed, single gang switch on a power lock and window switch bezel located near the forward end of the armrest on the passenger side front door trim panel. The power lock switch on the driver side front door trim panel is integral to the driver door module. (Refer to DRIVER DOOR MODULE - DESCRIPTION). The power lock switch is secured by integral latch tabs in a molded plastic receptacle on the back side of the power window and lock switch bezel so that only the switch paddle is visible where it protrudes through the bezel. The power window and lock switch bezel is secured by small metal snap clips within an opening near the forward end of the arm rest in the passenger side front door trim panel so that the switches can be serviced without removing the front door trim panel. An integral connector receptacle on the back of the switch connects it to the vehicle electrical system through a take out and connector of the right front door wire harness. The power lock switch has a green Light-Emitting Diode (LED) located in the switch paddle to improve switch visibility in dark ambient lighting conditions. The power lock switch cannot be adjusted or repaired and, if faulty or damaged, the switch unit must be replaced.


The two-way, momentary, power lock switch on the passenger side front door is connected in series between ground and the passenger door switch mux input of the Central Timer Module (CTM). The power lock switch on the driver side front door trim panel is integral to the driver door module. (Refer to DRIVER DOOR MODULE - OPERATION). 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 inputs, the CTM controls the battery and ground feed outputs to the power lock motors to lock or unlock the door and liftgate latches. The Light-Emitting Diode (LED) in the paddle of the passenger door power lock switch is connected to battery current through a fuse in the Junction Block (JB) on a fused ignition switch output (run) circuit; therefore, the switch will only be illuminated when the ignition switch is in the ON position. The power lock switch can be diagnosed using conventional diagnostic tools and methods.