how to fix my Ford F-150 13th Generation (2015-2020) locking issue with doors

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

555 words

Problem Statement

Learn how to diagnose and fix door locking issues in Ford F-150 13th Generation (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or short circuits
•Allow any components to cool down if the vehicle has been running before touching them

Symptoms

•Doors do not lock or unlock when using the key fob
•Interior lock switches are unresponsive
•Check for any warning lights on the dashboard related to the locking system
•Audible locking mechanism sounds are either absent or inconsistent
•Keyless entry system fails to respond

Diagnostic Steps

1
Inspect the key fob battery for any signs of wear or low charge
2
Check the vehicle's battery voltage to ensure it's within normal operating range (12.4 to 12.7 volts)
3
Use an OBD-II scanner to check for any fault codes related to the central locking system
4
Inspect wiring and connectors of the door lock actuators for damage or corrosion
5
Test individual door lock actuators for functionality by applying direct voltage
6
Verify the operation of the body control module (BCM) through a diagnostic tool

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Trim removal tools
•Small flathead screwdriver
•Wire strippers

Parts Required

•CR2032 key fob battery
•Door lock actuators (if faulty)

Related Faults

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Diagnostic Steps

1
Inspect the key fob battery for any signs of wear or low charge
2
Check the vehicle's battery voltage to ensure it's within normal operating range (12.4 to 12.7 volts)
3
Use an OBD-II scanner to check for any fault codes related to the central locking system
4
Inspect wiring and connectors of the door lock actuators for damage or corrosion
5
Test individual door lock actuators for functionality by applying direct voltage
6
Verify the operation of the body control module (BCM) through a diagnostic tool

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent electrical shock while working on the locking system.

2. Replace Key Fob Battery

Tools Required: Small flathead screwdriver.
Open the key fob using the screwdriver.
Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
Reassemble the key fob and test the locking function.

3. Inspect and Repair Wiring

Tools Required: Wire strippers, electrical tape, multimeter.
Visually inspect the wiring harnesses leading to the door lock actuators for frays or breaks.
Use a multimeter to check for continuity in the wiring.
Repair any damaged wires by splicing in new sections and securing with electrical tape.

4. Replace Door Lock Actuators (if necessary)

Tools Required: Socket set, trim removal tools.
Remove the interior door panel by unscrewing any screws and using trim removal tools to detach clips.
Disconnect the wiring harness from the door lock actuator.
Remove the old actuator by unscrewing it from the door.
Install the new actuator and reconnect the wiring harness.
Reassemble the door panel.

5. Reconnect Battery and Test

Reconnect the vehicle battery.
Test the locking and unlocking function of all doors using the key fob and interior switches.