Examination
1. Check fuse.
2. Check the operation of the brake light switch (voltage from the switch deactivates the cruise control system).
3. If the brake lights do not come on or turn off, correct the cause and recheck the cruise control system.
4. Check the freedom of movement of the cruise control cable, replace if necessary.
5. Check the cruise control speed sensor, which is mounted in the speedometer.
6. Check the operation of the system on a test drive. In case of abnormal operation of the system, contact a car service.