Pulse Operation

In addition to the features of a conventional (non-pulse) wiper system (mist, low and high speeds), the pulse type windshield 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 cover. The duration of the delay interval is determined by the delay resistor in the wiper/washer switch.

When the wiper switch is turned OFF, the wiper motor returns the wipers to the innerwipe position, and the wiper motor reverses, activating its external depressed-park mechanism to lower the wipers to the park position.

With the wiper switch in DELAY (pulse), battery voltage is applied to the wiper motor at terminal B through CKT 243. Voltage is also applied to terminal G through CKT 478 and terminal H through CKT 477.

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