Volkswagen Golf MK7.5 (2020-Present) interior lights stay on, what should I check?

Volkswagen Golf MK7.5 (2020-Present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

503 words

Problem Statement

Learn how to diagnose and fix the issue of interior lights staying on in Volkswagen Golf MK7.5. 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 battery before working on electrical systems.
•Handle electrical components carefully to avoid shorts.

Symptoms

•Interior lights do not turn off when the doors are closed
•Dome light remains on while driving
•Battery drains overnight due to lights being on
•Door Ajar warning light illuminated on the dashboard
•Lights flicker when the vehicle is in motion

Diagnostic Steps

1
Inspect door switches for proper operation and physical damage.
2
Use an OBD-II scanner to check for any related fault codes.
3
Manually test the operation of the interior light switch.
4
Check wiring and connectors for signs of shorts or corrosion.
5
Verify the operation of the vehicle's body control module (BCM).

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
•Socket set

Parts Required

•New interior light switch (if necessary)
•Replacement door switch (if necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect door switches for proper operation and physical damage.
2
Use an OBD-II scanner to check for any related fault codes.
3
Manually test the operation of the interior light switch.
4
Check wiring and connectors for signs of shorts or corrosion.
5
Verify the operation of the vehicle's body control module (BCM).

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect Door Switches

Locate the door switches on each door.
Remove the door panel if necessary to access the switches.
Test each switch with a multimeter to check for continuity when the door is open and closed.
- Tools Required: Multimeter
- Safety Warning: Handle electrical components carefully to avoid shorts.

3. Check Interior Light Switch

Locate the interior light switch on the ceiling.
Switch between all settings (on, off, and door) to ensure it functions correctly.
If faulty, replace with a new switch.
- Parts Required: New interior light switch (if necessary)

4. Inspect Wiring and Connectors

Visually inspect the wiring harnesses leading to the door switches and interior lights for any signs of damage or corrosion.
Use a wiring diagram to trace connections if necessary.
Repair or replace damaged wires and connectors.

5. Test the Body Control Module (BCM)

Reconnect the battery and use the OBD-II scanner to check for any BCM-related fault codes.
If codes are present, refer to the service manual for specific troubleshooting steps related to the BCM.
If the BCM is malfunctioning, consider replacing it.