Circuit Description

PULSE OPERATION
With the wiper switch in DELAY (pulse), battery voltage is applied to the wiper motor connector at terminal B through CKT 143. Voltage also is applied to terminal E through CKT 478 and terminal G through CKT 477.

The length of the delay time between sweeps is controlled by the variable pulse delay resistor in the wiper/washer switch. The delay is adjustable from 1 to 22 seconds.

LOW SPEED OPERATION
In the LO position of the wiper switch, battery voltage is applied to the wiper motor connector at terminal B through CKT 143 and terminal G through CKT 477. Voltage is also applied to terminal E through CKT 478.

HIGH SPEED OPERATION
In the HI position of the wiper switch, battery voltage is applied at terminals B, D and G of the wiper motor assembly through CKTs 143, 92 and 477. Voltage is also supplied to terminal E through CKT 478.

MIST OPERATION
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. If the wiper switch is held in MIST, the wipers will continue to operate until the switch is released. In the MIST position of the wiper switch, battery voltage is applied to the wiper motor connector at terminal B through CKT 143 and terminal G through CKT 477. Voltage is also applied to terminal E through CKT 478.

WASHER OPERATION
When the washer switch is pushed, battery voltage is applied to terminal E of the wiper motor assembly through CKT 478. The wiper motor has voltage applied to it automatically by the wiper motor cover circuit board and operates at low speed during the wash cycle and then for two sweeps after the wash cycle is complete. If the wipers had been in DELAY, LO, or HI, they would return to that operation after the wash cycle.