TOYOTA 2011 Tundra - Manual (Page 242)

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2-3. Operating the lights and wipers
n Intermittent wiper with interval adjuster
Wiper intervals can be adjusted for intermittent operation (when
is selected).
Intermittent windshield
wiper operation
Low speed windshield wiper
operation
High speed windshield
wiper operation
Temporary operation
Increases the intermittent
windshield wiper frequency
Decreases the intermittent
windshield wiper frequency