Front

Wiper Operation
"LO" and "HI" position - The front wiper motor has separate brushes for low and high speed operation. When the wiper switch is in "LO" or "HI" position, one of the two brushes is connected to ground through the wiper switch.

"OFF" position - When the wiper switch is turned "OFF" and the wipers are not at rest (out of "PARK"), the low speed brush of the wiper motor is grounded through the wiper motor switch, the timer circuit, and the wiper switch. The wiper motor continues to run until the wiper motor switch reaches the PARK position.

"INT" position - When the wiper switch is turned to "INT," the "INT" input of the timer is grounded. This ground input momentarily activates the intermittent relay, providing ground to the low speed brush of the wiper motor just long enough to move the wiper out of the PARK position. The remainder of the wipers' sweep is controlled by the wiper motor switch. The cycle repeats as long as the wiper switch is in "INT." The pause interval between sweeps is controlled by the solid-state timer. The length of the interval can be varied by adjusting the intermittent control knob.

Washer Operation
The front wiper motor operates as long as the washer switch is pressed. The "WASH" input of the intermittent solid-state timer is grounded during washer operation. This ground input activates the intermittent relay, providing ground to the low speed brush of the wiper motor. The wipers sweep for an interval controlled by the solid-state timer.

One-Touch Wipers
When the wiper stalk is pushed momentarily away from the driver, the wiper motor's low speed brush is grounded through the one-touch switch long enough for the wiper to move away from its PARK position. Once moved, it will continue to sweep because the wiper motor's low speed brush is now grounded through the wiper motor switch, the timing circuit, and the wiper switch. After one cycle, when the wiper returns to its PARK position, ground will be removed from the low speed brush and wiper operation will cease. Also, the wipers will continue to operate for as long as the wiper stalk is held in the one-touch position.