Wiper intermittent time control
Subaru Legacy / Subaru Legacy Owners Manual / Instruments and controls / Wiper and washer / Windshield wiper and washer switches / Wiper intermittent time control

When the wiper switch is in the “INT” position, turn the dial to adjust the operating interval of the wiper. The operating interval can be adjusted in five steps from the shortest interval to the longest.
See also:
Channel preset
...
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