Pulse Operation

With the wiper switch in DELAY (pulse), battery voltage is applied to the wiper motor at terminal B of connector C1 through the GRY wire. Voltage is also applied to terminal F through the PNK wire and the pulse delay resistor in the wiper/washer switch assembly. The battery voltage at terminal B energizes the park switch coil, which closes its contacts. In response to the voltage at terminal F, the solid-state timer momentarily closes contact A, which applies battery voltage at terminal B to the contacts of the park switch to start the wiper motor.

A mechanical arm (end of sweep input) operates contacts in the wiper motor cover assembly, which causes contact A to open when the wipers have completed their sweep. Since the park switch coil remains energized, the wipers do not park, but remain just above the park position until the cover assembly circuitry closes contact A again to start another sweep. The length of delay time between sweeps is controlled by the variable pulse delay resistor. The delay is adjustable from 0-25 seconds.