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.
Under normal operation the speed control actuator sends a signal through circuit 151 (LB/BK) to the speed control switches, which passes through the clockspring. The return signal is sent back through the clockspring to circuit 848 (DG/OG). When 2 buttons are pressed simultaneously, the speed control system enters a stand-by mode.