1. Cruise Control Switch: Check if the cruise control switch on the steering wheel is turned on. Make sure it is in the "On" position.
2. Brake Light Switch: Inspect the brake light switch located near the brake pedal. This switch is responsible for disengaging the cruise control when you brake. Make sure the switch is functioning properly and is not damaged.
3. Vacuum Lines: Check the vacuum lines connected to the brake booster and cruise control system. Look for any leaks or cracks in the lines. If found, replace the damaged vacuum lines.
4. Cruise Control Module: The cruise control module is responsible for controlling the cruise control system. Check if the module is properly connected and is receiving power. If the module is damaged, it may need to be replaced.
5. Vehicle Speed Sensor: The vehicle speed sensor provides the cruise control module with the information about the car's speed. Check the sensor for any damage or obstructions. Clean the sensor if necessary.
6. Transmission: If your car has an automatic transmission, check if the transmission is in the proper gear for cruise control. In most vehicles, the cruise control only works in gears D (Drive) or 4.
7. Wiring Harness: Check the wiring harness related to the cruise control system for any loose connections, corrosion, or damage. Repair or replace the affected wires as necessary.
If you are unable to identify or fix the issue, it's best to consult with a qualified mechanic or a local auto repair shop that specializes in Ford vehicles. They will be able to diagnose the problem accurately and perform necessary repairs.
