how can I fix the rear lights not working on my Volkswagen Golf MK7.5 (2020-Present)

Volkswagen Golf MK7.5 (2020-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

599 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix rear lights not working on Volkswagen Golf MK7.5. Step-by-step guide with symptoms, diagnostic steps, 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 systems to prevent short circuits.
•Allow the vehicle to cool before working on any components.

Symptoms

•Rear lights do not illuminate when headlights are turned on
•Brake lights fail to activate when brake pedal is pressed
•Turn signals may not function or flicker unusually
•Warning light on the dashboard indicating a bulb failure
•Possible blown fuses related to lighting system

Diagnostic Steps

1
Inspect the rear light bulbs for any signs of damage or burnout.
2
Check the fuses related to the rear lighting circuit using the fuse box diagram.
3
Test the wiring and connectors for corrosion or loose connections.
4
Use an OBD-II scanner to check for any related error codes.
5
Verify the functionality of the light switch and its wiring.

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

•Flathead screwdriver
•Multimeter
•Fuse puller
•Torque wrench

Parts Required

•Replacement bulbs (specific to rear light type)
•New fuses (correct amperage)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect the rear light bulbs for any signs of damage or burnout.
2
Check the fuses related to the rear lighting circuit using the fuse box diagram.
3
Test the wiring and connectors for corrosion or loose connections.
4
Use an OBD-II scanner to check for any related error codes.
5
Verify the functionality of the light switch and its wiring.

Solution

1. Preparation

Gather tools and materials: flathead screwdriver, multimeter, replacement bulbs, new fuses, and dielectric grease.
Ensure the vehicle is parked on a flat surface, the ignition is off, and the keys are removed.

2. Inspect and Replace Bulbs

Sub-steps:
1. Open the rear hatch and access the tail light assembly.
2. Remove the tail light assembly by unscrewing any retaining screws.
3. Carefully pull the assembly out and disconnect the wiring harness.
4. Remove the old bulbs by twisting them counterclockwise.
5. Install new bulbs by twisting them clockwise until secure.
6. Reconnect the wiring harness and carefully reassemble the tail light assembly.

3. Check and Replace Fuses

Sub-steps:
1. Locate the fuse box (usually found under the dashboard or in the engine compartment).
2. Refer to the fuse box diagram to find the specific fuse for the rear lights.
3. Remove the fuse using a fuse puller or flathead screwdriver.
4. Inspect the fuse; if it’s blown (the wire inside is broken), replace it with a new one of the same amperage.
5. Re-install the fuse and close the fuse box.

4. Test Wiring and Connectors

Sub-steps:
1. Use a multimeter to test for continuity in the wiring leading to the rear lights.
2. Inspect connectors for any signs of corrosion; clean them with electrical contact cleaner.
3. If damaged wires are found, repair or replace them as necessary.

5. Verify Light Switch Functionality

Sub-steps:
1. Remove the light switch from the dashboard by unscrewing or unclipping it.
2. Inspect the wiring connected to the switch for any damage or loose connections.
3. Test the switch using a multimeter to ensure it operates correctly.
4. Replace the switch if it is faulty.