my Honda Civic 10th Generation (2016-2021) interior lights stay on when doors are closed

Honda Civic 10th Generation (2016-2021)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

506 words

Problem Statement

Learn how to diagnose and fix the issue of interior lights staying on in Honda Civic 10th Generation (2016-2021). Step-by-step guide included.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Interior lights do not turn off when doors are closed
•Dome light remains on while driving
•Battery drains overnight if the issue persists
•Possible warning lights on the dashboard (e.g., door ajar indicator)
•Malfunctioning door locks or windows

Diagnostic Steps

1
Inspect each door switch for proper operation and ensure they are not stuck or damaged.
2
Use an OBD-II scanner to check for any relevant error codes related to door sensors or lighting.
3
Manually test the interior light switch to confirm it functions correctly.
4
Check the wiring and connectors related to the door switches for any signs of wear or damage.
5
Verify the operation of the body control module (BCM) and its settings regarding 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

•Multimeter
•OBD-II scanner
•Screwdriver set
•Wire stripper/crimper
•Electrical tape

Parts Required

•Door switch (if faulty)
•Electrical connectors (if necessary)

Related Faults

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Diagnostic Steps

1
Inspect each door switch for proper operation and ensure they are not stuck or damaged.
2
Use an OBD-II scanner to check for any relevant error codes related to door sensors or lighting.
3
Manually test the interior light switch to confirm it functions correctly.
4
Check the wiring and connectors related to the door switches for any signs of wear or damage.
5
Verify the operation of the body control module (BCM) and its settings regarding interior lighting.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Test Door Switches

Tools Required: Multimeter
Sub-steps:
1. Locate the door switches (usually found on the door frame).
2. Remove the door panel if necessary to access the switch.
3. Disconnect the electrical connector from the switch.
4. Use a multimeter to test for continuity when the switch is pressed and released.
5. If the switch is faulty, replace it with a new one.

3. Check and Repair Wiring

Tools Required: Wire stripper/crimper, electrical tape
Sub-steps:
1. Inspect the wiring harness leading to the door switches for any signs of fraying or damage.
2. Repair any damaged wires by stripping the ends and crimping new connectors or using solder and electrical tape.
3. Reconnect the wiring and ensure it is secured away from moving parts.

4. Verify Body Control Module Functionality

Tools Required: OBD-II scanner, service manual
Sub-steps:
1. Reconnect the negative battery terminal.
2. Use an OBD-II scanner to check for error codes related to the BCM.
3. If there are BCM errors, refer to the service manual for specific troubleshooting steps.
4. Reset the BCM settings if applicable and test the interior lights operation.