Power Door Lock Switch: Description and Operation
The driver side window/lock switch combines a power lock switch, a driver power window switch with an Auto-down feature, master switches for each
passenger door power window, a power window lockout switch, a power mirror selector switch, and four power mirror adjustment switches in a single
assembly. The switches in the window/lock switch can be diagnosed using conventional diagnostic tools and methods.
Power Lock Switch
The power lock switch circuitry is connected in series between ground and the driver door switch mux input of the instrument cluster (without memory).
If equipped with the memory system, the circuitry is connected to the memory mirror module. Each power lock switch position (Lock, Unlock, and
Neutral) provides a different resistance value to the instrument cluster or memory mirror input, which allows the instrument cluster or memory module to
sense the switch position. Based upon the power lock switch input, the instrument cluster or memory module controls the battery and ground feed outputs
to the individual power lock motors to lock or unlock the door latches. The Light-Emitting Diode (LED) in the power lock switch is connected to battery
current through the power window circuit breaker in the Integrated Power Module (IPM) on a fused ignition switch output (run-acc) circuit so that the
switch will be illuminated whenever the ignition switch is in the On or Accessory positions.
Power Window Switches
The power window switch circuitry is connected to battery current through a circuit breaker in the Integrated Power Module (IPM) on a fused ignition
switch output (run-acc) circuit so that the power windows will operate whenever the ignition switch is in the On or Accessory positions. Each two-way,
momentary master passenger power window switch in the window/lock switch provides battery current and ground to the individual power window
switches on each passenger door so that the power window switch controls the battery current and ground feeds to its respective power window motor.
The switch for the driver side front door power window includes an auto-down feature. When this switch is depressed to a second momentary detent
position and released, the driver door power window is automatically operated through an internal circuit and relay to its fully lowered position. The
Auto-down event is cancelled if the switch paddle is depressed a second time in either the Up or Down direction. When the two position window lockout
switch in the window/lock switch is depressed and latched in the lockout position, the battery current feed to each of the individual passenger power
window switches is interrupted so that the passenger door power windows can only be operated from the switches in the window/lock switch. The
window lockout switch also controls the battery current feed for the LED in each passenger power window switch so that the switch will not be
illuminated when it is locked out.