
The thumb wheel is used to set rain sensor sensitivity and interval wiper speed.
Single sweep

Move the lever down and release for a single sweep.
Wipers off

Move the lever to position 0 to turn off the windshield wipers.
Interval wipers

Move the lever upward to put the wipers in interval wiping mode. Set the number of sweeps per time unit with the thumb wheel when interval wipers are selected.
Continuous wipers

Move the lever upward for the wipers to operate at normal speed.

Move the lever upward again for the wipers to operate at high speed.
Important
Before activating the wipers, make sure that the wiper blades are not frozen in place and that any snow or ice on the windshield and rear window has been scraped away.