Jeep 2015 Grand Cherokee SRT - Owner Manual - Manual (Page 180)

NOTE: If the vehicle is moving less than 10 mph
(16 km/h), delay times will be doubled.
Windshield Washer Operation
To use the washer, push on the end of the lever (toward
the steering wheel) and hold while spray is desired. If the
lever is pushed while in the intermittent setting, the
wipers will turn on and operate for several wipe cycles
after the end of the lever is released, and then resume the
intermittent interval previously selected.
Intermittent Wiper Operation
Windshield Washer Operation
178 UNDERSTANDING THE FEATURES OF YOUR VEHICLE