The power window system incorporates a reversible motor for each window, a power window switch for all passenger windows and a power window master switch for the drivers window. Also within the master switch is a window lockout switch that allows the driver to disable the power window switches for the passenger windows.

When the ignition is in the RUN position, the PWR WDO circuit breaker supplies voltage to the power window master switch and the window lockout switch through CKT 343 (YEL). The passenger power window switches are supplied voltage from the window lockout switch through CKT 1307 (DK BLU). Ground is supplied from G202 through CKT 150 (BLK) to the power window master switch.

The power window master switch can control the UP / DOWN function of all the power windows. This is accomplished by wiring the power window master switch in series with the individual power window switches and motors. We'll use the RR power window for an example. Ground is supplied from G202 through CKT 150 (BLK) to connector C2 cavity C of the power window master. The internal circuitry of the power window master switch has this ground at the normally closed contacts of the master window switch to connector C2 cavity H and into CKT 170 (LT GRN) and connector C1 cavity H and into CKT 171 (PPL). These circuits connect to the RR power window switch at cavity E for CKT 170 (LT GRN) and cavity A for CKT 171 (PPL). With the RR power window switch in the at rest position, the normally closed contacts allow ground to the RR power window motor through CKT 670 (DK BLU) and CKT 671 (BRN). Since both sides of the RR power window motor are grounded, placing the power window master switch for the RR window in the DOWN position, voltage will be applied to CKT 171 (PPL) from CKT 343 (YEL) through the closed contacts of the switch and the RR power window goes DOWN. By placing the power window master switch for the RR window in the UP position, voltage will be applied to CKT 170 (LT GRN) from CKT 343 (YEL) through the closed contacts of the switch and the RR window goes UP.

The example used above for the RR window is the same for any other window in the vehicle, however, the circuit numbers and wire colors change between windows.

The difference between controlling the power windows with the individual power window switch opposed to using the master switch is that the voltage supplied to the individual power window switches comes from the window lockout switch through CKT 1307 (DK BLU). Ground for the power window motors is still supplied through the power window master switch to G202 through CKT 150 (BLK). Again, we'll use the RR power window as an example. By placing the RR power switch in the DOWN position, voltage is applied from CKT 1307 (DK BLU) through the closed contacts of the switch to CKT 671 (BRN) to the power window motor. Since CKT 670 (DK BLU) is connected in series through the normally closed contacts of both switches to ground G202, the RR power window goes DOWN. By placing the RR power window switch in the UP position, the polarity reverses and the window goes UP.