Quick System Check

If the system fails to operate, check the following as possible sources of the problem: Check the brake lights. The entire brake light circuit must be operational for cruise control to work. Check the fuse that powers cruise control circuit.
Check the operation of brake and clutch safety switches by listening for a faint click when pedals are depressed. Remove the short section of hose between the vacuum reservoir and valve body at the valve body and check for vacuum.
If there is no vacuum, check for loose or cracked hoses. Check all plug-in connections to ensure good contact. Check to make sure speedometer operates.