Rainsense Operation

With the wiper switch in AUTO DELAY (Rainsense), battery voltage is applied to the wiper motor connector at terminal B through CKT 143. Voltage is also applied to terminal C through CKT 478 and terminal H through CKT 477. Anytime the ignition switch is in RUN or ACCY, battery voltage is present at Rainsense module connector terminal 8 through CKT 43.

A Pulse-Width-Modulated (PWM) signal is sent from the wiper motor cover to the Rainsense module through CKT 482. The type of PWM signal sent is determined by which AUTO DELAY position is selected on the wiper/washer switch.

The Rainsense module then sends a PWM signal back to the wiper motor cover on CKT 481. The type of PWM signal is determined by the input from the wiper motor cover and the amount of rain sensed on the windshield. The wiper motor cover receives the signal from the rainsense module and actuates the wiper motor accordingly.