See Figure 1
Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions. However, steep grades up or down may cause variations in the selected speeds. The electronic cruise control system has the capability to cruise, coast, resume speed, accelerate, "tap-up" and "tap-down".
The main parts of the cruise control system are the functional control switches, speed control assembly, actuator, intermediate link, auto-cruise control module assembly, speed sensor, and the release switches.
Depending upon the year and/or model of your vehicle, the cruise control system is either vacuum or electronically controlled. The cruise control module assembly contains a low speed limit which will prevent system engagement below 25 mph (40 km/h). The module is controlled by the functional switches located on a lever on the steering column or steering wheel and on the instrument panel.
The release switches are mounted on the brake/clutch/accelerator pedal bracket. When the brake or clutch pedal is depressed, the cruise control system is electrically disengaged and the throttle is returned to the idle position.