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Wash Mode

WARNING: This page is about a different car, the 2006 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

When the control sleeve of the right multi-function switch is rotated counterclockwise to the rear momentary WASH position for more than about one-half second with the rear wiper system operating, the SCM sends an electronic washer switch  status message to the FCM, then the FCM directs battery current and ground to the washer pump/motor unit. This will cause the washer pump/motor unit to be energized in the rear washer direction for as long as the switch is held closed (up to approximately 10 seconds) and to be de-energized when the control sleeve is released. The SCM also provides a hard wired output to the rear wiper module indicating the selected mode and, if the rear wipers are operating in the intermittent mode, the rear wiper module operates the rear wiper motor at a fixed speed until the control sleeve is released.

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