How can I fix the Ford Explorer 2021's trunk release not functioning?

Issue: Trunk Release Not Functioning on 2021 Ford Explorer

Symptoms:

• Trunk release button on key fob does not activate trunk.
• Trunk release button on dashboard or driver’s side does not work.
• Manual trunk release (if equipped) may also be non-functional.
• No clicking sound or motor operation when attempting to release the trunk.

Step 1: Check the Key Fob Battery

1. Remove the Key Fob: Use a small screwdriver to open the key fob.
2. Inspect the Battery: Check the battery for corrosion or wear. Replace if necessary with a new CR2032 battery.
3. Test the Key Fob: After replacing the battery, test the trunk release function. If it works, the problem is resolved.

Step 2: Verify Dashboard Button Functionality

1. Visual Inspection: Check for any physical damage or debris around the dashboard trunk release button.
2. Electrical Test:
   • Disconnect the connector behind the button.
   • Use a multimeter to check for continuity across the switch terminals when pressed. A reading of near zero ohms indicates a good switch.
   • If no continuity, replace the button.

Step 3: Inspect the Trunk Release Actuator

1. Access the Trunk Lid: Open the trunk manually and remove the trim panel using trim removal tools.
2. Locate the Actuator: The actuator is typically mounted near the latch mechanism.
3. Electrical Check:
   • Disconnect the actuator's electrical connector.
   • Use a multimeter to check for power at the connector while pressing the trunk release button.
   • If no power is present, trace back to the wiring harness for shorts or disconnections.

Step 4: Check the Wiring Harness

1. Inspect Wiring: Check for any damaged wires along the harness leading to the trunk release actuator and switch.
2. Repair/Replace Wires: If any wires are damaged, repair them using solder and heat shrink tubing, or replace the harness if necessary.

Step 5: Scan for DTCs (Diagnostic Trouble Codes)

1. Connect OBD-II Scanner: Plug the scanner into the vehicle’s OBD-II port.
2. Scan for Codes: Check for any trouble codes related to the Body Control Module (BCM) or trunk release system.
3. Interpret Codes: If codes are present, refer to the service manual for specifics on troubleshooting those codes.

Repair Instructions:

Step 1: Replace Key Fob Battery (if applicable)

• Ensure the new battery is installed in the correct orientation, then reassemble the fob.

Step 2: Replace Dashboard Button (if faulty)

• Remove the faulty button and install the new switch. Reconnect the electrical connector and secure the trim back.

Step 3: Replace Trunk Release Actuator (if faulty)

1. Remove Old Actuator: Unscrew the actuator from the trunk latch assembly.
2. Install New Actuator: Position the new actuator in place and secure with screws.
3. Reconnect Electrical Connector: Ensure the connection is secure.

Step 4: Reassemble Trim Panels

• Once repairs are complete, reattach any trim panels securely, ensuring no clips are broken.

Step 5: Test the System

1. Test All Release Methods: After repairs, test the trunk release button on the key fob, dashboard, and any manual release.
2. Double Check Functionality: Ensure the trunk opens smoothly and latches properly.

Conclusion

If after following these steps the trunk release still does not function, further diagnostic work may be required, including in-depth BCM checks or professional assistance. Always refer to the service manual for specific repair information related to your vehicle.