Wash Mode

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

When the control stalk of the right multi-function switch is pulled rearward to the front momentary Wash position for more than about one-half second with the wiper system operating, the SCM sends an electronic washer switch message to the FCM, which directs battery current to the windshield washer pump. This will cause the washer pump to be energized for as long as the Wash switch is held closed (up to approximately 10 seconds) and to be de-energize when the control stalk is released.

When the control stalk is pulled rearward to the front momentary Wash position while the front wiper system is operating in one of the Delay interval positions, the windshield washer pump operation is the same. However, the FCM also energizes the wiper on/off relay to override the selected delay interval and operate the wiper motor in a continuous low speed mode for as long as the control stalk is held in the front momentary Wash position, then de-energizes the relay and reverts to the selected delay mode interval several wipe cycles after the control stalk is released. If the Wash switch is held closed for more than approximately ten seconds, the FCM will suspend windshield washer pump operation until the control stalk is released for about two seconds, then cycled back to the Wash position.