how to fix interior lights staying on in Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

596 words

Problem Statement

Learn how to diagnose and fix interior lights staying on in Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the negative battery terminal before working on electrical systems to avoid shock or short circuits.

Symptoms

•Interior lights remain illuminated even after the vehicle is turned off
•Dome light does not turn off when the doors are closed
•Battery drains overnight if the vehicle is not used
•Warning message on the dashboard regarding the door or hatch being open
•Possible malfunction of door switches or sensors

Diagnostic Steps

1
Check the door ajar switch by opening and closing each door to see if the interior lights turn off.
2
Inspect the dome light switch to ensure it is not stuck in the 'on' position.
3
Scan the vehicle's body control module (BCM) for any error codes related to the interior lighting system.
4
Verify the condition of the battery and test for proper voltage and load.
5
Inspect the wiring harness and connectors related to the interior lighting for any damage or corrosion.
6
Check for any aftermarket accessories that may be interfering with the lighting system.

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

•Multimeter
•Screwdriver
•OBD-II scanner
•Torx screwdriver
•Wire stripper/crimping tool

Parts Required

•Replacement door ajar switch (if faulty)
•Replacement dome light switch (if necessary)

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Symptoms

•Interior lights remain illuminated even after the vehicle is turned off

•Dome light does not turn off when the doors are closed

•Battery drains overnight if the vehicle is not used

•Warning message on the dashboard regarding the door or hatch being open

•Possible malfunction of door switches or sensors

Diagnostic Steps

1
Check the door ajar switch by opening and closing each door to see if the interior lights turn off.
2
Inspect the dome light switch to ensure it is not stuck in the 'on' position.
3
Scan the vehicle's body control module (BCM) for any error codes related to the interior lighting system.
4
Verify the condition of the battery and test for proper voltage and load.
5
Inspect the wiring harness and connectors related to the interior lighting for any damage or corrosion.
6
Check for any aftermarket accessories that may be interfering with the lighting system.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Ensure the vehicle is parked on a level surface and the ignition is off.

2. Inspect and Test Door Ajar Switches

Tools Required: Multimeter, screwdriver
Sub-steps:
1. Use a multimeter to test the continuity of each door ajar switch.
2. If a switch is faulty, remove the interior panel, disconnect the switch, and replace it with a new one.
3. Reassemble the panel and reconnect the battery.

3. Check and Replace the Dome Light Switch

Tools Required: Torx screwdriver, replacement dome light switch
Sub-steps:
1. Remove the dome light assembly by unscrewing it from the ceiling.
2. Disconnect the wiring harness from the dome light switch.
3. Replace the switch with a new one, ensuring it is secured properly.
4. Reconnect the wiring harness and reassemble the dome light.

4. Reset the Body Control Module (BCM)

Tools Required: OBD-II scanner
Sub-steps:
1. Connect the OBD-II scanner to the vehicle’s diagnostic port.
2. Navigate to the BCM module and select the option to clear error codes.
3. Remove and reconnect the negative battery terminal to reset the system.

5. Inspect Wiring and Connections

Tools Required: Multimeter, wire stripper/crimping tool
Sub-steps:
1. Visually inspect the wiring harness connected to the interior lights for any signs of wear, fraying, or corrosion.
2. Use a multimeter to check for proper voltage at each connector.
3. Repair any damaged wiring using a wire stripper and crimping tool, ensuring all connections are secure.