Wiper and Washer Systems: Description and Operation

The permanent magnet three-brush windshield wiper motor allows selection of either low or high speed, when selected via the steering column mounted multi-function switch. When the multi-function switch is moved to the OFF position, the windshield wiper motor will continue to run at low speed until the windshield wiper motor parks.

When the multi-function switch is in the interval (INT) position, the windshield wipers will make a single sweep followed by a pause. The control knob on the end of the multi-function switch adjusts the pause from approximately 1-20 seconds.

The Generic Electronic Module provides a speed-dependent interval wiper feature. During the INT mode, the delay between successive wipes will decrease with higher vehicle speed to compensate for increased water on the windshield glass. This feature will relieve the operator of constantly switching between interval settings.

To engage the windshield washer, push the knob of the multi-function switch toward the steering column. When the multi-function switch is in the OFF or INT position, the windshield wipers will run as long as the knob is depressed. When the knob is released, the washer will stop immediately, but the windshield wipers will continue to run for two to three sweeps, then return to their previous set operation. Washer engagement does not affect windshield wiper operation when the multi-tunction switch is in the LOW or HIGH position.