The following components are used to control the power windows:

The vehicle is equipped with power windows controlled by the door modules. Each passenger door window can be operated, either from a power window switch built into the driver door switch assembly (DDSA), or, from a power window switch mounted locally on its associated door. The driver door window can be operated only from the driver door power window switch built into the driver door switch assembly (DDSA).

When the driver door module (DDM) receives a window switch request from the DDSA, or a passenger door module (PDM, LRDM, or RRDM), receives a window switch request from, either, the DDSA, or one of the local window switches mounted on one of the passenger doors, the door module examines the request and checks to see if it has received any messages from any of the other vehicle modules prohibiting the movement. If conditions are correct, and no prohibitive messages have been received, the associated door module then supplies power and ground to its associated window motor to move the window as requested.

Each passenger door has a separate power window switch mounted to it. In order to receive a signal from their associated switch, the passenger door modules, (PDM, LRDM, and RRDM) each supply battery positive voltage and ground to their associated power window switch. There are three circuits for battery positive voltage between each passenger door power window switch and its associated door module: one for an Up signal, one for a Down signal, and one for an Express Down signal. The door modules each supply ground to their switch via a fourth circuit. When the switch is activated for an Up, Down, or Express Down function, the normally open switch contacts for that function are closed, and voltage flows through the switch, providing the associated door module with the necessary signal.

The driver door switch assembly (DDSA) contains the only power window switch for the driver door window, and, also contains a window switch for each of the vehicles passenger doors. However, these switches differ from the individual passenger door power window switches mounted locally on the passenger doors in that, there are no external circuits. When a power window switch is operated on the DDSA, the DDSA interprets the switch signal, and then sends the appropriate request message, via the class 2 serial data link, to the appropriate door module to operate the window.

Each door module has its own battery positive voltage supply circuit to use for power window operation, but they are all fed by the same 30 amp power window circuit breaker located in the rear fuse block. Each door module also has a separate ground circuit to use for power window operation. These circuits are in the same dedicated connector as the window motor drive circuits of each door module.

Each door module supplies battery positive voltage and ground, through the window motor drive circuits, to its associated window motor. The window motors are reversible. The direction the window moves depends on which motor drive circuit the battery positive voltage is applied to, and which motor drive circuit the ground is applied to. To move the window in the Up direction, the module applies battery positive voltage to the window motor Up drive circuit, and ground to the window motor Down drive circuit. When a window movement in the opposite direction is needed, the module reverses the polarity and supplies power and ground to the opposite circuits to move the window in the reverse direction.

All of the windows have the Express Down feature. This allows the windows to be fully opened by momentarily pressing the appropriate window switch to the second detente of the Down position.

The rear window lockout switch is built into the Driver Door Switch Assembly (DDSA). The lockout function is used to prevent both rear windows from being operated from their locally mounted switches When the lockout switch is pressed momentarily, the LED indicator is illuminated, and the DDSA receives the switch signal. The DDSA sends the switch status, via class 2 serial data message, to the left rear door module (LRDM) and the right rear door module (RRDM). The LRDM and RRDM then prohibit the rear windows from being operated from the rear door window switches. When the lockout function has been activated, both rear door windows can still be operated from the driver door by using the window switches built into the DDSA.