Theory Of Operation
WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
The Horn Switch is connected to the Right Steering Switch. The switching status is transferred to the Cluster by way of the LIN bus, a serial sub-bus. The Cluster converts the data to a CAN Bus signal and sends the message to the corresponding module on the bus.