Theory Of Operation

WARNING: This page is about a different car, the 2022 Chrysler Voyager and 2022 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

The Washer Pump Motor is a reversible motor that is used for the Front and Rear Washers. The Front and Rear Washer Switches are hardwired to the Steering Column Control Module (SCCM). The SCCM sends Front and Rear Washer Switch commands through the CAN C Bus to the Body Control Module (BCM).

When the BCM receives a CAN C Bus message to activate the Front Washers, the BCM provides a voltage signal to the Washer Pump Motor, through the Front Washer Pump Motor Control circuit, and a ground path through the Rear Washer Pump Motor Control circuit.

When the BCM receives a CAN C Bus message to activate the Rear Washer, the BCM provides a voltage signal to the Washer Pump Motor, through the Rear Washer Pump Motor Control circuit, and a ground path through the Front Washer Pump Motor Control circuit.