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

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

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

511 words

Problem Statement

Learn how to diagnose and fix the issue of interior lights staying on in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or short circuits.

Symptoms

•Interior lights do not turn off after closing the doors
•Dome light remains on while driving
•Battery drains when the vehicle is not in use
•Warning chimes may sound intermittently
•Door ajar warning message may display on the dashboard

Diagnostic Steps

1
Check the door switch operation for each door by manually pressing the switch to see if the lights turn off.
2
Inspect the vehicle's interior light settings via the dashboard settings menu.
3
Scan for any error codes using an OBD-II scanner to check for related faults.
4
Test the battery voltage to ensure it is within normal operating range.
5
Inspect the wiring harness and connectors related to the door switches for any damage or corrosion.
6
Examine the fuse box for any blown fuses related to interior lighting.

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

•Screwdriver set
•Multimeter
•OBD-II scanner

Parts Required

•Door switch(es) (if faulty)
•Wiring connectors (if damaged)

Related Faults

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Diagnostic Steps

1
Check the door switch operation for each door by manually pressing the switch to see if the lights turn off.
2
Inspect the vehicle's interior light settings via the dashboard settings menu.
3
Scan for any error codes using an OBD-II scanner to check for related faults.
4
Test the battery voltage to ensure it is within normal operating range.
5
Inspect the wiring harness and connectors related to the door switches for any damage or corrosion.
6
Examine the fuse box for any blown fuses related to interior lighting.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the negative battery terminal to prevent electrical shock.
Tools Required: Screwdriver set, multimeter, OBD-II scanner.

2. Check and Replace Door Switches

Sub-steps:
1. Remove the door panel using a screwdriver to access the door switch assembly.
2. Disconnect the wiring harness from the door switch.
3. Use a multimeter to test the door switch for continuity when pressed. If no continuity is detected, replace the door switch.
4. Install the new door switch in reverse order of removal.
5. Reconnect the door panel and ensure it is securely fastened.

3. Reset Interior Light Settings

Sub-steps:
1. Turn on the ignition (without starting the engine).
2. Navigate to the vehicle settings on the dashboard display using the control buttons.
3. Locate the interior lighting settings and toggle the switch to ensure it is set to automatic.
4. Turn off the ignition and check if the lights turn off after closing the doors.

4. Inspect Wiring and Connections

Sub-steps:
1. Inspect the wiring leading to the door switches and interior lights for any signs of wear or damage.
2. Repair or replace any damaged wiring found.
3. Ensure all connectors are securely fastened and free of corrosion.