The Windshield Wiper/Washer System consists of the following components:

Ignition positive voltage is supplied to the windshield wiper washer switch, windshield wiper motor relay, and the windshield wiper motor position switch from the 30A WIPER fuse 9 in the fuse block. The windshield wiper motor relay controls the voltage supply used for windshield wiper motor operation during delay, mist, wash, and park modes. The wiper motor supply circuit from the wiper motor relay is routed through the windshield wiper/washer switch where it is spliced to the wiper motor low speed supply circuit.

The windshield wiper motor high and low speed supply circuits are spliced to the body control module and used as signal circuits. When the body control module detects voltage on the high or low speed wiper motor supply circuits the low beam headlamps are turned on.

When the windshield wiper washer switch is in the low position voltage is supplied from the switch through the low speed supply circuit to the windshield wiper motor. When the windshield wiper washer switch is moved to the off position the windshield wiper motor relay continues to supply voltage to the low speed supply circuit until the wiper motor position switch closes to ground indicating the windshield wipers are in the park position.

When the windshield wiper washer switch is in the high position voltage is supplied from the switch through the high speed supply circuit to the windshield wiper motor. When the windshield wiper washer switch is moved to the off position the windshield wiper motor relay continues to supply voltage to the low speed supply circuit until the wiper motor position switch closes to ground indicating the windshield wipers are in the park position.

When the windshield wiper washer switch is in the delay position voltage is supplied from the windshield wiper washer switch to the interval switch. The interval switch is a variable resistor and supplies the voltage signal to the windshield wiper motor relay which determines the frequency of the wiper cycles. The windshield wiper motor relay controls the wiper motor operation by supplying the motor operating voltage through the windshield wiper motor switch to the low speed supply circuit.

When the windshield wiper washer lever is taped up and released a voltage signal is supplied through the delay signal circuit to the windshield wiper motor relay. The wiper motor relay starts a wipe cycle and continues supplying operating voltage to the wiper motor until the position switch signal closes to ground.

When the windshield wiper washer switch is pulled to the wash position voltage is supplied from the windshield wiper washer switch to the windshield washer pump and the windshield wiper motor relay. The voltage from the washer switch to the washer pump is the suply voltage and is continuous as long as the washer switch is held closed. The voltage supply from the washer switch to the wiper motor relay is a signal voltage and the wiper motor relay will continue to supply the windshield wiper motor with operating voltage for approximately 5 seconds after the washer switch is released.

The heated windshield washer nozzles prevent nozzle freeze-up in cold weather. Ignition positive voltage is supplied to both of the windshield washer nozzles. The windshield washer nozzles are permanently grounded to G103.

The IPC illuminates the low washer fluid indicator when the following occurs: