how to fix the tail lights not working on my Volkswagen Golf Seventh Generation (2013-2020)

Volkswagen Golf Eighth Generation (2020-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

557 words

Problem Statement

Learn how to diagnose and fix tail lights not working on Volkswagen Golf (2013-2020). 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 shock or short circuits.

Symptoms

•Tail lights do not illuminate when headlights are activated
•Brake lights are non-functional
•Check engine light illuminated (in some cases)
•Dashboard warning light for exterior lights activated
•Bulbs visually intact but unlit

Diagnostic Steps

1
Inspect the tail light bulbs for any signs of burning out or damage.
2
Check the tail light fuse in the fuse box for continuity.
3
Use an OBD-II scanner to detect any stored error codes related to lighting.
4
Examine the tail light assembly and wiring harness for any visible damage or corrosion.
5
Verify the function of the light switch on the dashboard.
6
Measure voltage at the tail light socket using a multimeter while the headlights are activated.

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

•Screwdriver set
•Pliers
•Multimeter
•Fuse puller
•Electrical contact cleaner

Parts Required

•Tail light bulbs (specific type as per owner’s manual)
•Replacement fuses (as required)

Related Faults

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Diagnostic Steps

1
Inspect the tail light bulbs for any signs of burning out or damage.
2
Check the tail light fuse in the fuse box for continuity.
3
Use an OBD-II scanner to detect any stored error codes related to lighting.
4
Examine the tail light assembly and wiring harness for any visible damage or corrosion.
5
Verify the function of the light switch on the dashboard.
6
Measure voltage at the tail light socket using a multimeter while the headlights are activated.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface, and the ignition is turned off.
Disconnect the negative battery terminal for safety.

2. Replace Tail Light Bulbs

Open the trunk and remove any necessary panels to access the tail light assembly.
Twist and remove the tail light bulb sockets from the assembly.
Replace any burnt-out bulbs with new bulbs of the same type (consult the owner's manual for specifications).
Reinsert the bulb sockets securely back into the tail light assembly.

3. Check and Replace Fuses

Locate the fuse box (usually found under the dashboard or in the engine compartment).
Identify the tail light fuse using the diagram on the fuse box cover or the owner's manual.
Remove the fuse using a fuse puller or pliers.
Inspect the fuse for continuity; if blown, replace it with a new fuse of the same amperage.

4. Inspect Wiring and Connectors

Visually inspect the wiring harness connected to the tail light assembly for fraying or corrosion.
Clean any corroded connectors with electrical contact cleaner.
If any wires are damaged, repair them using heat-shrink tubing or electrical tape.

5. Test Light Switch

Check the functionality of the light switch by turning it on and off while observing the dashboard lights.
If the switch is faulty, replace it with a new one by removing the steering column covers (if required) and disconnecting the old switch.