- Faulty Control Switch: Check if the cruise control switch on the steering wheel is properly functioning. If it's damaged or loose, it might need to be repaired or replaced.
- Cruise Control Module: The cruise control module is responsible for controlling the speed of the vehicle when cruise control is engaged. A malfunctioning module could lead to the cruise control not working.
- Brake Switch: The brake switch sends signals to the cruise control module when the brake pedal is pressed. If the switch is faulty, the cruise control may not engage or disengage properly.
- Vacuum Lines: The 1994 Prism uses a vacuum-based cruise control system. If any of the vacuum lines or diaphragms are damaged, the cruise control may not function correctly.
- Speed Sensor: The speed sensor provides the vehicle speed information to the cruise control module. If the speed sensor is faulty, the cruise control may not engage or maintain the set speed accurately.
- Wiring Issues: Check for any loose connections, damaged wires, or broken connectors in the cruise control system. Faulty wiring can lead to intermittent or complete failure of the cruise control system.
Before troubleshooting any electrical components, always consult the vehicle's service manual or seek assistance from a qualified mechanic.
