Speed Control Indicator
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The instrument cluster (IC) receives the speed control data from the PCM over the HS-CAN. When the speed control is engaged, the PCM provides a signal to the instrument cluster (IC) to illuminate the speed control indicator.