Front Wiper and Washer Systems

In addition to the features of a conventional (non-pulse) Wiper System (mist, low and high speeds), the pulse-type Wiper/Washer System includes an operating mode in which the Wipers make single sweeps with an adjustable time interval between sweeps. The time interval is controlled by a Solid State Timer in the Wiper Motor Module. The duration of the delay interval is determined by the Pulse Delay Resistor in the Windshield Wiper/Washer Switch Assembly.

PULSE OPERATION

With the Wiper Switch in "PULSE," voltage is applied to the Windshield Wiper Motor Module at connector C1 terminal "F", through the PNK wire. Voltage is also applied to connector C1 terminal "B" through the GRY wire. The Variable Resistance seen through the Pulse Delay Resistor is used by, the Windshield Wiper Motor Module to determine the delay time between sweeps.

LOW SPEED

In the "LO" position, the Windshield Wiper Switch applies battery voltage to the Windshield Wiper Motor Module at connector C1 terminal "C" through the DK GRN wire and to connector C1 terminal "B" through the GRY wire. The Windshield Wiper Motor Module supplies power from connector C1 terminal "A" through the YEL jumper wire to connector C2 terminal "B" to the Windshield Wiper Motor.

HIGH SPEED

In the "HI" position, the Wiper Switch applies battery voltage to the Windshield Wiper Motor Module at connector C1 terminal "C" through the DK GRN wire and to connector C1 terminal "B" through the GRY wire.
The Windshield Wiper Motor Module supplies power from connector C1 terminal "A" through the YEL jumper wire to connector C2 terminal "B" to the Wiper Motor. The Windshield Wiper Motor also has voltage applied from the Wiper/Washer Switch to connector C2 terminal "A" through the PPL wire to a separate armature brush for high speed operation.

OFF POSITION

When turned "OFF" from any position, the Wipers complete the last sweep and park. When the Wiper Switch is in "OFF," the Windshield Wiper Motor Module has battery voltage applied to connector C1 terminal "C" through the DK GRN wire and connector C1 terminal "F" through the PNK wire. The Windshield Wiper Motor Module controls power through the Park Relay to connector C1 terminal "A" through the YEL jumper wire to connector C2 terminal "B" to the Wiper Motor, which runs until the Park Relay is opened. The Park Relay is controlled both electronically and mechanically.
The Relay is held closed mechanically until the Wipers reach the park position and Wiper Request is no longer present. Whenever Wiper Request is present, the Relay is held closed electronically.

WASHER OPERATION

When the Washer Switch is turned to "ON," the Wipers operate at low speed using the same circuit operation as low speed, or the same as high speed only if "HI" speed is selected.
When the Washer Switch is held "ON," the Windshield Wiper Motor Module will keep the Windshield Washer Pump Motor "ON" only as long as the Washer Switch is held "ON." If Wipers had been in "PULSE," "LO" or "HI" they would return to that operation after the wash cycle. If not, they then return to the park position after approximately 3 sweeps.

MIST

When the Wiper Switch is moved to "MIST" and released, the Wipers make one sweep at low speed and return to park. The circuit operation is the same as that of low speed.