With Pulse

With the ignition switch in the "ON" position, Battery voltage is applied through Fuse C-8 to the WINDSHIELD WIPER MOTOR, INTERMITTENT WIPER RELAY and WINDSHIELD WIPER/WASHER SWITCH. This wiper system uses a Pawl and Switch assembly to control sweep cycles. Sweep cycles will occur under the following conditions: with the WINDSHIELD WIPER/ WASHER SWITCH in the "OFF" position and the wipers not parked. As soon as the wipers park, a voltage signal is provided through the WINDSHIELD WIPER MOTOR to the INTERMITTENT WIPER RELAY. Until this signal is received, the INTERMITTENT WIPER RELAY will supply a ground for the LO side of the WINDSHIELD WIPER MOTOR.


PULSE OPERATION

When the "INT" button is pressed, a ground signal is provided through the switch to terminal 7 of the INTERMITTENT WIPER RELAY. When this signal is received, the INTERMITTENT WIPER RELAY begins providing a ground to the LO side of the WINDSHIELD WIPER MOTOR every four seconds. Because the Pawl and Switch assembly allows the WINDSHIELD WIPER MOTOR to operate as soon as the wipers leave the PARK position, the WINDSHIELD WIPER MOTOR is grounded only temporarily.


LOW SPEED OPERATION

When the "LO" button is pressed, the LO side of the WINDSHIELD WIPER MOTOR is directly grounded through the WINDSHIELD WIPER/WASHER SWITCH to G201. Since the WINDSHIELD WIPER MOTOR receives Battery voltage whenever the ignition switch is in the "ON" position, the motor will operate as long as the button remains depressed.


HIGH SPEED OPERATION

When the "HI" button is pressed, the HI side of the WINDSHIELD WIPER MOTOR is directly grounded through the WINDSHIELD WIPER/WASHER SWITCH to G201. Since the WINDSHIELD WIPER MOTOR receives Battery voltage whenever the ignition switch is in the "ON" position, the motor will operate as long as the "HI" button is held down.

MIST OPERATION

Pressing the OFF/MIST" button momentarily grounds the LO side of the WINDSHIELD WIPER MOTOR through the WINDSHIELD WIPER/WASHER SWITCH to G201. Once the wipers have moved from the PARK position, the Pawl and Switch assembly maintain wiper operation for at least one full sweep.


WASHER OPERATION

As long as the WASH button is pressed, Battery voltage is applied directly to the WINDSHIELD WASHER PUMP and the INTERMITTENT WIPER RELAY. Because the WINDSHIELD WASHER PUMP is permanently grounded at C103, the pump operates as long as Battery voltage is applied. When the voltage signal is received at the INTERMITTENT WIPER RELAY, the relay provides a ground for the LO side of the WINDSHIELD WIPER MOTOR long enough to complete at least two full sweeps.