Rainsense Operation

With the wiper/washer switch in one of the AUTO DELAY positions, voltage is applied to the Rainsense module connector terminal 6 through the PNK wire. This voltage first passes through one of five parallel resistors in the wiper/washer switch. Which resistor the voltage passes through is determined by which AUTO DELAY position the wiper/washer switch is in. Turn the wiper/washer switch toward OFF to reduce sensitivity. The amount of voltage the Rainsense module receives controls its level of sensitivity.

Battery voltage is applied to the wiper motor cover assembly from the wiper/washer switch at terminal C of connector C1 through the GRY wire. The Rainsense module sends voltage to the wiper motor cover on terminal G of connector C1 through the LT GRN wire for automatic low-speed wiping. The Rainsense module sends voltage to the wiper motor cover on terminal F of connector C1 through the LT BLU wire for automatic high speed operation.

A cam operates the contacts in the wiper motor cover assembly, which causes contact A to open when the wipers have completed their sweep. Because the park switch coil remains energized, the wipers do not park, but remain just above park position until the cover assembly circuitry closes contact A again to start another sweep. The length of time between sweeps is controlled by the amount of rain the Rainsense module senses and the AUTO DELAY position selected on the wiper/washer switch.