Update to our Jeep..After our dealer kept our Jeep a couple of days and tried to recreate the events, they stumbled upon a loose alternator connector that was not securely plugged in. This loose connection caused unpredictable erratic behavior on our dash and unleashed the "possessed" wipers. Any bump that was significant enough to displace the connector caused the "gremlins" to appear. Have had the Jeep back 4 days without any mishaps. Fingers crossed her also.