why do my interior lights stay on in my Ford F-150 13th Generation (2015-2020)

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

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

542 words

Problem Statement

Learn how to diagnose and fix interior lights that stay on in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid shocks or shorts.

Symptoms

•Interior lights do not turn off after closing doors
•Battery drains when the vehicle is parked
•Dome light remains on while driving
•Possible warning messages on the dashboard
•Malfunctioning door switches indicated by inconsistent light behavior

Diagnostic Steps

1
Check for any open doors by visually inspecting all doors, including the tailgate and the hood.
2
Scan for error codes using an OBD-II scanner to detect any fault codes related to the Body Control Module (BCM).
3
Test the door switches with a multimeter to ensure they are functioning correctly (open and close circuits as intended).
4
Inspect the interior light switch to ensure it is not stuck in the 'on' position.
5
Verify the settings in the vehicle's menu (if equipped) to check for any interior lighting settings that may keep lights on.
6
Check the wiring harnesses and connectors for any signs of damage or corrosion.

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
•Screwdrivers
•Trim removal tool
•Socket set

Parts Required

•Door switch (if defective)
•Interior light switch (if defective)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check for any open doors by visually inspecting all doors, including the tailgate and the hood.
2
Scan for error codes using an OBD-II scanner to detect any fault codes related to the Body Control Module (BCM).
3
Test the door switches with a multimeter to ensure they are functioning correctly (open and close circuits as intended).
4
Inspect the interior light switch to ensure it is not stuck in the 'on' position.
5
Verify the settings in the vehicle's menu (if equipped) to check for any interior lighting settings that may keep lights on.
6
Check the wiring harnesses and connectors for any signs of damage or corrosion.

Solution

1. Preparation

Gather tools and materials.
Disconnect the negative battery terminal to prevent electrical shorts while working on the vehicle.

2. Inspect and Test Door Switches

Remove the door panel to access the door switch.
- Tools Required: Screwdriver, trim removal tool, socket set.
Detach the wiring connector from the door switch.
Use a multimeter to test the continuity of the switch; it should show open when the door is closed and closed when the door is open.
Replace the door switch if it is faulty.

3. Inspect Interior Light Switch

Locate the interior light switch, usually on the dashboard or ceiling.
Ensure that the switch is not stuck in the "on" position; if it is, free it and test its function.
If the switch is defective, replace it with a new one.

4. Check BCM Settings

Reconnect the battery terminal.
Access the vehicle settings through the dashboard menu.
Navigate to the interior lighting options and ensure that they are set to turn off automatically after a certain period.
If settings are correct and the issue persists, the BCM may require reprogramming or replacement.