The cruise control computer gets its signal from the following sources: brake pedal switch, clutch pedal switch (if equipped), electronic vacuum control valve, throttle position sensor, wheel speed sensors and vehicles onboard computer.
A failure in any of these parts will cause the cruise control stop working. Most common failure however is a relay or the brake lamp switch.
Average cost for diagnosis $59 for most cars. Average cost for repairs $159 – $259 for most cars. What’s in the future for cruise control system:
Adaptive Cruise Control
A more advanced cruise control that can automatically adjust a car’s speed to maintain a safe following distance. This new technology, called adaptive cruise control, uses forward-looking radar, installed behind the grill of a vehicle, to detect the speed and distance of the vehicle ahead of it.
Adaptive cruise control is similar to conventional cruise control in that it maintains the vehicle’s pre-set speed. However, unlike conventional cruise control, this new system can automatically adjust speed in order to maintain a proper distance between vehicles