Cruise Control: Description and Operation

OPERATION
To operate the speed control system, the engine must be running and vehicle speed must be greater than 30 mph. The System is turned on by pressing the "ON" switch of the speed control switch assembly.

Set/ACCEL Or Coast
Pressing and releasing "SET/ACCEL" or "COAST" sends a command to hold the present speed. This speed is now the set speed. The Vehicle Speed Sensor (VSS) (at the transmission) sends signals to the speed control amplifier. These signals tell the amplifier to increase or decrease the vacuum at the servo motor to keep the vehicle at the set speed.

Set/Accel
Pressing and holding "SET/ACCEL" speeds up the vehicle. The vehicle's speed increases as long as "SET/ACCEL" is depressed. Releasing "SET/ACCEL" gives the System a new set speed to maintain. Vehicle speed may also be increased by depressing the accelerator until the higher speed is reached, then depressing and releasing "SET/ACCEL".

Coast
Pressing and holding "COAST" slows down the vehicle. The vehicle speed decreases as long as "COAST" is depressed. Releasing "COAST" gives the system a new set speed to maintain.

OFF
Pressing "OFF" turns off the system, grounding the 151 LB/BK wire. The System is also turned off when the brake pedal is depressed (power through R/LG wire) or the ignition switch is turned off. The deactivator switch also operates when the brake system has pressure. This is a backup device to release the servo.

When the System has been deactivated by depressing the brake or clutch pedal, the last set speed may be resumed by pressing "RESUME". This feature will not work if "OFF" has been depressed, or if vehicle speed is below 30 mph.