Wipers

INTERVAL (PULSE) OPERATION
With the ignition switch in the ON position, B+ is applied to terminal D of the windshield wiper motor. With the windshield wiper and windshield washer switch in the INTERVAL position, B+ is applied to terminal A of the windshield wiper motor. B+ is also applied to terminal 6 of the interval switch. The interval switch then sends a voltage signal to terminal 1 of the windshield wiper motor relay K8. The windshield wiper motor relay K8 interprets this signal as the time of delay for the wipers. The windshield wiper motor relay K8 outputs a voltage signal to terminal C of the windshield wiper motor. This voltage signal determines the delay for the wipers. The windshield wiper motor operates the wipers for the desired delay. The length of delay time is determined by the interval switch.

LOW SPEED OPERATION
With the ignition switch in the ON position, B+ is applied to terminal D of the windshield wiper motor. When the windshield wiper and windshield washer switch is in the LOW position, B+ is applied to terminal A of the windshield wiper motor. The windshield wiper motor operates the wipers at LOW speed until the windshield wiper and windshield washer switch is turned to the OFF position.

When the windshield wiper motor is operating at LOW speed, the windshield wiper motor relay K8 monitors the voltage at terminal C of the windshield wiper motor. The voltage on this circuit varies from 5V to 12V. When the windshield wiper and windshield washer switch is turned to the OFF position, the windshield wiper motor relay K8 uses this circuit to return the windshield wiper motor to the PARK position.

HIGH SPEED OPERATION
With the ignition switch in the ON position, B+ is applied to terminal D of the windshield wiper motor. When the windshield wiper and windshield washer switch is in the HIGH position, B+ is applied 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 motor is operating at HIGH speed, the windshield wiper motor relay K8 monitors the voltage at terminal C of the windshield wiper motor. The voltage on this circuit varies from 7V to 10V. When the windshield wiper and windshield washer switch is turned to the OFF position, the windshield wiper motor relay K8 uses this circuit to return the windshield wiper motor to the PARK position.

MIST OPERATION
With the ignition switch in the ON position, B+ is applied to terminal 8 of the windshield wiper motor relay K8. When the windshield wiper and windshield washer switch is in the MIST position, B+ is applied to terminal 2 and terminal 6 of the windshield wiper motor relay K8. B+ is also applied to terminal 1 of the windshield washer pump.

When B+ is applied to terminal 1 of the windshield washer pump, the windshield washer pump operates and sprays windshield washer fluid on the windshield. Terminal 2 of the windshield washer pump is permanently grounded to G103.

When B+ is detected at terminal 2 and terminal 6 of the windshield wiper motor relay K8, the windshield wiper motor relay K8 outputs B+ from terminal 5 to terminal C of the windshield wiper motor for approximately 5 seconds. The windshield wiper motor operates the wipers for approximately 5 seconds and then returns the wipers to the PARK position.

WINDSHIELD WASHER NOZZLE OPERATION
The heated windshield washer nozzles prevent nozzle freeze-up in cold weather. When the ignition switch is in the ON position, B+ is applied to both of the windshield washer nozzles. The windshield washer nozzles are permanently grounded to G103.