Normal Operation
WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The speed control status information is sent to the instrument cluster from the powertrain control module (PCM) over the communication network. When the speed control is activated the lamp illuminates.