how to fix the rear defroster not working in Volkswagen Golf Seventh Generation (2013-2020)

Volkswagen Golf MK7.5 (2020-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

538 words

Problem Statement

Learn how to diagnose and fix the rear defroster not working in Volkswagen Golf (2013-2020). Step-by-step guide with symptoms, tools, and solutions.

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 avoid short circuits.

Symptoms

•Rear defroster switch does not illuminate when activated
•No heat or defrosting effect on the rear window
•Possible blown fuse for the rear defroster circuit
•Intermittent operation of the defroster
•Visible damage to the defroster grid on the rear window

Diagnostic Steps

1
Check the rear defroster switch for proper illumination when turned on.
2
Inspect the rear window defroster grid for visible damage or breaks.
3
Use a multimeter to test continuity across the defroster grid lines.
4
Inspect the fuse box for a blown fuse related to the rear defroster.
5
Verify the wiring harness and connections leading to the rear defroster grid.

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

•Multimeter
•Fuse puller or needle-nose pliers
•Defroster repair kit (if applicable)
•Screwdriver set

Parts Required

•Replacement fuse (if necessary)
•Defroster repair kit (if grid is damaged)

Related Faults

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Diagnostic Steps

1
Check the rear defroster switch for proper illumination when turned on.
2
Inspect the rear window defroster grid for visible damage or breaks.
3
Use a multimeter to test continuity across the defroster grid lines.
4
Inspect the fuse box for a blown fuse related to the rear defroster.
5
Verify the wiring harness and connections leading to the rear defroster grid.

Solution

1. Preparation

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

2. Check the Fuse

Locate the fuse box (typically under the dashboard or in the engine compartment).
Remove the cover to access the fuses.
Identify the fuse for the rear defroster (refer to the fuse diagram).
Use a fuse puller or pliers to remove the fuse and inspect it for continuity.
- If blown, replace with a fuse of the same amperage (usually 30A).

3. Inspect the Defroster Grid

Visually inspect the rear window defroster grid for any breaks or damage.
If damaged, use a defroster repair kit to repair any broken lines.
- Clean the area around the break with a glass cleaner to ensure proper adhesion.

4. Test Continuity of the Grid

Reconnect the battery and use a multimeter to check for continuity across the defroster grid.
Place one probe on one end of a grid line and the other probe at the opposite end.
- If continuity is absent, the grid may need further repair or replacement.

5. Repair Wiring Connections

Inspect wiring harness and connectors leading to the rear defroster grid.
Repair any damaged wires or loose connections by soldering or using appropriate connectors.
Ensure all connections are tight and free of corrosion.