Trouble Shooting
- Set brakes. Place transmission in Neutral or Park. Start engine. If cruise control engages when engine is started, unplug electronic control module. Replace module if condition does not repeat with module unplugged.
- Release brakes and accelerate vehicle to desired speed. If cruise control engages without actuating "SET" button, electrical circuit or instrument panel switch is faulty.
- Depress and release "SET" button. Remove foot from accelerator. Speed should be controlled. If speed setting is too high or low, electrical circuit is faulty, there are vacuum leaks at valve body or vacuum motor, there is excessive slack in carburetor cable or speed control chain, or valves in valve body are sluggish.
- If there is no speed control when button is pressed, fuse is blown, cruise control chain is disconnected, electrical or vacuum circuits are faulty, speed sensor or instrument panel switch is faulty, valve body is faulty, or clutch, brake or speed control switches are improperly adjusted.
- If there is speedometer noise, excessive needle waver, or erratic servo lock-in performance, speedometer cable is damaged, there is excessive slack in carburetor cable, vacuum source is faulty, valves in cruise control valve body are sticking, or control module is faulty.
- Drive the vehicle over a rough road. If unit disengages, brake light and speed control switch adjustment is incorrect, or there is a loose connection. Tap brake pedal lightly. If there is no disengagement of system, brake light and cruise control switch adjustment is incorrect, vacuum motor hose is kinked or damaged, cruise control chain is damaged, or electrical circuit is faulty.
- If in step 6), carburetor does not return to normal idle, cruise control chain is damaged, misadjusted, or throttle linkage is faulty. If in step 6), cruise control disengaged, depress "RESUME" button. Vehicle should resume previous speed.
- If there is no resume when button is depressed, switch or electrical circuit is faulty. If vehicle resumes speed, cruise control is okay. If resume speed is possible below 25 MPH, electrical circuit is faulty.