Theory Of Operation
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Speed Control Switch Assembly sends signals via a Local Interconnect Network (LIN) Bus circuit to the Steering Column Control Module (SCCM). The SCCM acts as a pass through that delivers the signals/inputs from the Speed Control Switch Assembly on to the Powertrain Control Module (PCM) via the Controlled Area Network (CAN) Bus.