Without Pulse

WIPER (CONVENTIONAL)

When the Wiper/Washer Switch is in LO, battery voltage is applied through the GRY wire directly to the low speed brushes of the Wiper Motor. The Wiper Motor runs at low speed.

When the Wiper/washer Switch is in HI, battery voltage is applied through the PPL wire to the high speed brushes of the Wiper Motor. The motor operates at a higher speed.

The Park Switch is open only when the wiper blades are in the Park position. In all other positions, the Park Switch is closed. When the Wiper/Washer Switch is moved to OFF, battery voltage at the WHT wire is applied through the Park Switch, the ORN wire, the Wiper/Washer Switch, and the GRY wire to the low speed brushes of the Wiper Motor. The Wiper Motor continues to run at low speed until the wiper blades reach the Park position. At that time, the Park Switch opens and stops the Wiper Motor.

The Wiper Motor is protected by a circuit breaker which opens if the current through the Motor rises to a high level. This may happen if the wiper blades are blocked by ice or snow. The circuit breaker resets automatically after it cools off.

LOW SPEED

In the LO position, the Wiper/washer Switch supplies voltage to the GRY wire and the Delay/Speed/wash Control. The Delay/Speed/wash Control provides ground to the Park/Run Relay which is energized and supplies voltage to the brushes of the Wiper Motor. The wipers run at low speed until they are turned off.

HIGH SPEED

With the Wiper/washer Switch in the HI position, battery voltage is supplied from the PPL wire directly to a second armature terminal of the Wiper Motor. The wipers run at high speed. When the Wiper/washer Switch is turned to OFF, the wipers complete the last sweep at low speed and park.

PARK

When the wipers are turned off, the Wiper Motor runs at low speed until the wiper blades reach the PARK position. At that time the Park/Run Relay opens and shunts the Wiper Motor to stop it immediately. The wiper blades remain in the PARK position.

MIST

When the control 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 Low Speed.

WASHER (CONVENTIONAL WIPER)

The Washer Motor is energized whenever the Washer Switch is pressed and runs as long as the Washer Switch is closed. Battery voltage is applied through the Washer Switch and the PNK wire to the Washer Motor. The other terminal of the Motor is grounded through the BLK wire.