Normal Operation

CIRCUIT OPERATION

NOTE: The power window system in this vehicle is different from other vehicles in that a window timer module along with window down relays are used. This module allows for normal window operation when the window switches are activated. However, when the power top switch is activated the module will partially lower all the windows.

The power window system is powered by a 20 Amp circuit breaker located in the junction block cavity 19. This circuit breaker also supplies power to the window down the normally OPEN contacts of the window down relays.

The circuit breaker receives its feed from the ignition switch on the A22 circuit. This circuit breaker is HOT when the ignition switch is in the RUN position only.

Circuit F21 is the feed circuit from the circuit breaker to the power window switches. The ground path for the power windows, window timer module, and window down relays is on the Z1 circuit and terminates at the instrument panel left side cowl.

Both of the door switches have a Light Emitting Diode (L.E.D.) located inside of the switch. This diode allows the operator to see the switch when it is dark. The diodes are powered at all times when the ignition switch is in the RUN position.

Resistors and diodes internal to the switches are used for the L.E.D's. No attempt should be made to repair these items. If the L.E.D. is not working, the switch should be replaced.

Each window motor has an internal circuit breaker to protect the motor from excessive electrical loads. This circuit breaker is not serviceable.