Theory Of Operation
WARNING: This page is about a different car, the 2020 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The Rear Wiper/Washer Switch is part of the Right Multifunction Switch and is integral to the Steering Column Control Module (SCCM). The SCCM is located at the top end of the Steering Column, underneath the Steering Wheel. The SCCM includes the Clockspring, the Multifunction Switch and a LIN/CAN C Gateway. LIN Bus messages received by the LIN/CAN C Gateway are broadcast over the CAN C Bus to the appropriate modules.