Windows: Description and Operation

CAUTION: You could injure your arms, hands, or fingers if you unintentionally switch the driver's window to "automatic down" while working in that door with the power on. Disconnect the window switch connector before you start.


System Description

The operation of the power windows is controlled by the main switch in the master power window switch. When the main switch is in OFF, only the driver's door window can be opened or closed. With the main switch in ON, all windows can be opened or closed by either the master power window switch or the window switches in the doors. The driver's window switch has an automatic down mode which is turned on by pushing the switch down to its second position.

The power windows are driven by reversible motors. Each motor is protected by a built-in circuit breaker. If the window switch is held on too long (with the window obstructed, or after the window is fully up or down) the circuit breaker opens the circuit. The circuit breaker resets automatically as it cools.

When the ignition switch is in RUN or START, and for 10 minutes after it is switched to OFF the integrated control unit provides voltage to the coil in the power window relay. The contacts of the power window relay close and voltage is applied to the master power window switch and all the window switches in the doors.


Driver's Window

With the ignition switch in RUN or START, and for 10 minutes after it is switched OFF the integrated control unit provides voltage to the coil of the power window relay. The contacts of the power window relay close and voltage is applied to the driver's power window switch. When you move the driver's power window switch to UP voltage is applied to the power window motor. The motor's ground path is back through the driver's power window switch. The power window motor drives the window up as long as you hold the switch in the UP position. When you move the switch to DOWN, voltage is applied in the opposite direction and the motor drives the window down as long as you hold the switch in the DOWN position.

Automatic Down (Driver's Window)

With the ignition switch in RUN or START, voltage is applied to the coil of the power window relay through the integrated control unit. The contacts of the power window relay close, applying voltage to the driver's power window switch. When you push the driver's switch to the AUTO DOWN position, voltage is applied through the driver's switch to the power window motor. The control unit receives pulses at the pulser input while the motor is operating. When the window is fully down,the motor stops and pulses are no longer generated by the pulser. This is sensed by the control unit (at the pulser input terminal), and voltage is no longer applied to the power window motor.


Passenger Windows

With the ignition switch in RUN, and for 10 minutes after it is switched to OFF, voltage is applied to the coil of the power window relay by the integrated control unit.The contacts of the power window relay close,applying voltage to all window switches. Once you turn on the main switch in the master panel, the passenger windows can be operated from their door switches or from the master panel.

When you move the window switch in the right front door to UP voltage is applied to the right front power window motor. The motor is grounded through the contacts in the right front power window switch and the master panel switch. The window then moves up as long as you hold the switch in the UP position. If you move the right front door window switch to DOWN, voltage is applied in the opposite direction, and the window moves down as long as you hold the switch in the DOWN position. The other passenger windows operate similarly.