Normal Operation
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
When the brake pedal is firmly applied the speed control deactivator switch opens. This causes circuit 535 (LB/RD) to open. The speed control actuator then releases the throttle, sending the actuator into standby mode until the speed control resume or set switch is pressed or the speed control is switched off or the ignition is turned off.