Normal Operation
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The PCM sends a signal through circuit 151 (LB/BK) to the speed control switches which pass through the clockspring. The return signal is sent through circuit 848 (DG/OG) and the clockspring.