HIGH Speed Operation

With the ignition switch in the ON position, B+ is applied to terminal 4 of the windshield wiper and windshield washer switch. B+ is also applied to terminal D of the windshield wiper motor and terminal 8 of the windshield wiper motor relay K8. When the windshield wiper switch is in the HIGH position, B+ is applied through circuit M9 to terminal E of the windshield wiper motor. The windshield wiper motor operates the wipers at HIGH speed until the windshield wiper and windshield washer switch is turned to the OFF position.

When the windshield wiper and windshield washer switch is turned to the OFF position, the windshield wiper motor relay K8 monitors the voltage at terminal C of the windshield wiper motor. The voltage on terminal C of the windshield wiper motor, is determined the position of a internal switch (voltage will remain at 12V until the motor enters the PARK position). When the windshield wiper motor relay K8 sees 12V on terminal C of the windshield wiper motor, the windshield wiper motor relay K8 outputs B+ from terminal 2 to the windshield wiper switch terminal 8. The windshield wiper switch then applies the voltage through circuit B7 to terminal A of the windshield wiper motor, causing the windshield wiper motor to continue running.

When the windshield wiper motor goes in the PARK position, the position switch closes to ground and the monitored voltage on terminal C of the windshield wiper motor goes to 0V. The windshield wiper relay K8 turns oft B+ from terminal 2 of the relay to terminal 8 of the windshield wiper switch. Voltage is no longer applied through circuit B7 to terminal A of the windshield wiper motor and the motor stops in the PARK position.