Windows: Description and Operation

WARNING

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 or the battery when working in the driver's door.


System Description


Voltage to the power windows is controlled by the main switch in the master power window panel switch. When the main switch is OFF, only the driver's door window can be opened or closed. With the main switch ON, the passenger's window can be opened or closed by its master switch in the driver's door or by its own switch in the passenger's door. The driver's window switch also has an automatic down mode.

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.


Driver's Window


The integrated control unit provides voltage to the coil of the power window relay with the ignition switch in ON (and for 10 minutes after it is switched to OFF, and as long as both doors remain closed). The contacts of the power window relay close and voltage is applied to the master power window switch. When you move the driver's power window switch to UP, voltage is applied to the master power window motor. The motor ground path is back through the driver's power window switch. The driver's power window motor drives the window up. When you move the driver's power window switch to DOWN, voltage is applied in the opposite direction and the motor drives the window down.

Automatic Down (Driver's Window)


With the ignition switch in ON (II) or START (III), voltage is applied to the coil of the power window relay through the integrated control unit. The contacts of the power window relay close and voltage is applied to the driver's power window switch. When you push the driver's switch to the AUTO DOWN position, voltage is applied to the driver's 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 and voltage is no longer applied to the motor.


Passenger Window


The integrated control unit provides voltage to the coil of the power window relay with the ignition switch in ON (II) (and for 10 minutes after it is switched to OFF, and as long as both doors remain closed). The contacts of the power window relay close and voltage is applied to the passenger's power window switch and the driver's window switches. With the main switch in the master panel ON, you can operate the passenger window from the passenger's door switch or from the master switch in the driver's door.

When you move the passenger's power window switch to UP, voltage is applied to the passenger's power window motor. The motor is grounded through the contacts in the passenger's power switch and the master switch. The window moves 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 window moves down as long as you hold the switch in the DOWN position.

When you move the passenger's window switch to UP, voltage is applied through the passenger 5 power window switch contacts to the passenger 5 power window motor. The motor is grounded through the contacts in the passenger's power window switch and the master switch. The window moves up as long as you hold the switch in the UP position. If you move the passenger's 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.