Theory Of Operation
WARNING: This page is about a different car, the 2016 RAM 3500 HD and 2016 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 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 Can Bus.