See Figures 1 and 2
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, cruise control module assembly, vehicle speed sensor and the release switches.
The cruise control system uses the module assembly to obtain the desired operation. Two components in the module help to do this. One is the electronic controller and the second is the electric stepper motor. The controller monitors the vehicle speed and operates the stepper motor. The motor moves a ribbon and throttle linkage in response to the controller. 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 in the turn signal/headlamp switch and windshield wiper lever.
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.
See Figure 3