why does my Volkswagen Golf MK7 (2015-2019) interior light stay on

Volkswagen Golf MK8.5 (2024-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

572 words

Problem Statement

Learn how to diagnose and fix the issue of interior lights staying on in a Volkswagen Golf MK7 (2015-2019). Step-by-step guide with solutions and tips.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent short circuits or shocks.
•Ensure the vehicle is in a safe, stable position before performing repairs.

Symptoms

•Interior lights remain on even when doors are closed
•Dome light does not turn off after ignition is switched on
•Possible battery drain if the vehicle is left unused for an extended period
•Warning message on the dashboard regarding door status
•Difficulty in operating other electrical components related to interior lighting

Diagnostic Steps

1
Check the door ajar status on the dashboard to ensure it accurately reflects door closures.
2
Inspect each door switch for proper function and ensure they are not stuck in the 'open' position.
3
Scan for error codes using an OBD-II scanner to identify any related faults in the lighting or body control module.
4
Test the interior light switch settings to ensure it is not set to the 'always on' position.
5
Verify the wiring and connections to the door switches and the body control module.

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 (flathead and Phillips)
•Socket set
•Wiring harness repair kit

Parts Required

•Door switch(es) (if faulty)
•Interior light switch (if faulty)
•Wiring harness repair kit (if necessary)

Related Faults

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Symptoms

•Interior lights remain on even when doors are closed

•Dome light does not turn off after ignition is switched on

•Possible battery drain if the vehicle is left unused for an extended period

•Warning message on the dashboard regarding door status

•Difficulty in operating other electrical components related to interior lighting

Diagnostic Steps

1
Check the door ajar status on the dashboard to ensure it accurately reflects door closures.
2
Inspect each door switch for proper function and ensure they are not stuck in the 'open' position.
3
Scan for error codes using an OBD-II scanner to identify any related faults in the lighting or body control module.
4
Test the interior light switch settings to ensure it is not set to the 'always on' position.
5
Verify the wiring and connections to the door switches and the body control module.

Solution

1. Preparation

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

Tools Required:

OBD-II scanner
Multimeter
Screwdrivers (flathead and Phillips)
Socket set
Wiring harness repair kit (if needed)

2. Inspect Door Switches

Sub-steps:
1. Remove the door panel on suspected doors using a screwdriver and socket set.
2. Locate the door switch and visually inspect for damage or debris.
3. Use a multimeter to test the continuity of the switch when pressed; it should show continuity in the "closed" position.
4. Clean or replace any faulty switches.

3. Check Interior Light Switch Settings

Sub-steps:
1. Locate the interior light switch, usually found near the overhead console.
2. Ensure that the switch is set to the "off" position or to the "door" setting, and not to "always on."
3. If the switch is faulty, replace it with a new one.

4. Inspect Wiring and Connections

Sub-steps:
1. Trace the wiring from the door switches to the body control module for any signs of damage or shorts.
2. Repair any damaged wiring using a wiring harness repair kit.
3. Ensure all connectors are secure and free from corrosion.

5. Reconnect Battery and Test

Sub-steps:
1. Reconnect the vehicle battery.
2. Test the interior lights by opening and closing the doors to see if they turn off as expected.
3. Clear any stored fault codes and verify that the issue is resolved.