how to solve the issue with the rear lights not working in Volkswagen Golf MK7 (2015-2019)

Volkswagen Golf MK8.5 (2024-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

568 words

Problem Statement

Learn how to diagnose and fix rear lights not working on Volkswagen Golf MK7 (2015-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to prevent short circuits.

Symptoms

•Rear lights do not illuminate when vehicle is in operation
•Turn signals do not function or flash quickly
•Brake lights do not activate when brake pedal is pressed
•Warning message on dashboard regarding rear light failure
•Possible blown fuses related to rear lighting system

Diagnostic Steps

1
Inspect the rear light bulbs for any signs of damage or burnout.
2
Check the fuse box for blown fuses related to the rear lighting.
3
Use an OBD-II scanner to check for any fault codes that may indicate electrical issues.
4
Inspect the wiring harness and connectors for corrosion, damage, or loose connections.
5
Test the rear light sockets for proper voltage using a multimeter.

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

•Socket set
•Multimeter
•OBD-II scanner
•Electrical cleaner
•Fuse puller

Parts Required

•Replacement bulbs
•Replacement fuses

Related Faults

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Diagnostic Steps

1
Inspect the rear light bulbs for any signs of damage or burnout.
2
Check the fuse box for blown fuses related to the rear lighting.
3
Use an OBD-II scanner to check for any fault codes that may indicate electrical issues.
4
Inspect the wiring harness and connectors for corrosion, damage, or loose connections.
5
Test the rear light sockets for proper voltage using a multimeter.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Tools Required: Socket set, multimeter, OBD-II scanner, replacement bulbs, fuses (if needed), electrical cleaner.
Ensure the vehicle is parked safely, and the ignition is off.

2. Replace Bulbs

Sub-step 1: Open the trunk and remove the access panel to the rear light assembly.
Sub-step 2: Twist the bulb socket counterclockwise to remove it from the assembly.
Sub-step 3: Pull out the old bulb and replace it with a new one, ensuring it is securely fitted.
Sub-step 4: Reinstall the bulb socket by twisting it clockwise into the assembly.
Sub-step 5: Replace the access panel.

3. Replace Fuses (if necessary)

Sub-step 1: Locate the fuse box, typically found in the driver’s side footwell or under the hood.
Sub-step 2: Identify the fuse related to the rear lights using the diagram on the fuse box cover or owner’s manual.
Sub-step 3: Use a fuse puller or pliers to remove the blown fuse.
Sub-step 4: Insert a new fuse of the same amperage into the socket.
Sub-step 5: Close the fuse box securely.

4. Repair Wiring and Connectors (if necessary)

Sub-step 1: Inspect the wiring harness that leads to the rear lights for any visible damage or wear.
Sub-step 2: Use electrical cleaner to clean any corrosion from connectors.
Sub-step 3: Repair any damaged wires using electrical tape or replace the harness if necessary.
Sub-step 4: Ensure all connectors are securely reattached.