TrailBlazer 4WD L6-4.2L VIN S (2002)
Power Window Lockout Switch: Description and Operation
POWER WINDOW LOCKOUT OPERATION
The DDM contains a window lockout switch that is responsible for the disabling of all the passenger windows from the individual passenger window
switches. When the window lockout switch is activated, the DDM transmits a Class 2 message indicating that a window lockout request has been
received. When the PDM receives this message, it will disable the power window motor up and down circuits. When the BCM receives this message,
it will interrupt the up and down relay coil feed voltage for both rear doors. Once activated the lockout feature will remain in effect until the ignition
switch is cycled or the DDM receives another power window lockout switch activation.
