What should I do if my 2020 Ford Explorer's cruise control is not working?

If your 2020 Ford Explorer's cruise control is not working, follow these detailed diagnostic and repair steps to identify and potentially fix the issue.

Step 1: Preliminary Checks

• Check for Warning Lights: Inspect the dashboard for any warning lights that may indicate a related issue (e.g., ABS, engine, or traction control lights).
• Inspect the Brake Pedal: Ensure that the brake pedal is not sticking or depressed when cruise control is activated.

Step 2: Use an OBD-II Scanner

• Gather Tools: OBD-II scanner, vehicle owner's manual.
• Connect the Scanner: Plug the OBD-II scanner into the vehicle's diagnostic port, usually located under the dashboard near the driver's seat.
• Read Codes: Scan for any diagnostic trouble codes (DTCs) that may relate to the cruise control system. Common codes include P0571 (Cruise Control/Brake Switch A Circuit Range/Performance Problem).

Tools Required

• OBD-II scanner
• Multimeter
• Screwdrivers (Phillips and flathead)
• Torque wrench
• Basic hand tools (wrenches, sockets)
• Vehicle service manual (for specific torque specs and procedures)

Repair Instructions

Step 3: Inspect the Cruise Control Switch

1. Remove the Steering Wheel Cover:
   • Use a screwdriver to remove screws securing the airbag module.
   • Disconnect the battery before working on the airbag system to prevent accidental deployment.
2. Access the Cruise Control Switch:
   • Unscrew and detach the switch from the steering column.
3. Test the Switch:
   • Use a multimeter to measure continuity across the cruise control switch terminals when activated.
   • If there is no continuity, the switch is faulty and needs replacement.

Step 4: Check Brake Light Switch

1. Locate the Brake Light Switch:
   • It is typically located above the brake pedal.
2. Test the Brake Light Switch:
   • Using a multimeter, check for continuity when the brake pedal is not pressed.
   • If the switch is open when the pedal is released, it may need adjustment or replacement.

Step 5: Inspect Wiring and Connectors

1. Visual Inspection:
   • Check for any damaged or frayed wiring in the cruise control circuit, including connectors at the switch, brake pedal, and any related modules.
2. Repair or Replace Damaged Wiring:
   • Use electrical tape or solder connections as needed to repair damaged wires.

Step 6: Check the Vehicle Speed Sensor (VSS)

1. Locate the VSS:
   • Refer to the service manual for the exact location.
2. Test the VSS:
   • Use a multimeter to check the output signal from the VSS while the vehicle is moving.
   • If the signal is weak or nonexistent, replace the VSS.

Step 7: Inspect the Fuses

1. Locate the Fuse Box:
   • Find the fuse box under the dashboard or in the engine compartment.
2. Check Fuses Related to Cruise Control:
   • Identify the fuse for cruise control (refer to the owner's manual).
   • If the fuse is blown, replace it with the same amperage.

Step 8: Reassemble and Test

1. Reassemble Components:
   • Reattach any panels or covers that were removed during diagnosis.
2. Reconnect the Battery:
   • Reconnect the negative battery terminal.
3. Test the Cruise Control System:
   • Take the vehicle for a test drive to ensure cruise control engages and operates correctly.

Conclusion

If after following all these steps the cruise control still does not work, it may be necessary to consult a professional technician or visit a Ford dealership for further diagnostics. They have specialized equipment and software that can diagnose more complex electronic issues.