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Home/Cars/Volkswagen/Tiguan/Second Generation (2018-present)/my Volkswagen Tiguan's dashboard lights are flickering what's the issue

my Volkswagen Tiguan's dashboard lights are flickering what's the issue

Volkswagen Tiguan Second Generation (2018-present)

Severity: mediumDifficulty: medium1-3 hours
3 min read
510 words

Problem Statement

Learn how to diagnose and fix flickering dashboard lights in Volkswagen Tiguan. Step-by-step guide with diagnostic procedures and repair instructions.

Component
Electrical
Repair Time
1-3 hours

Safety Warnings

  • ⚠Disconnect the battery before working on the electrical system to avoid electrical shock.
  • ⚠Allow the engine to cool before inspecting electrical components to prevent burns.

Symptoms

  • •Dashboard lights flickering intermittently
  • •Possible dimming or brightening of interior lights
  • •Electrical components (e.g., radio, navigation) malfunctioning
  • •Potential warning lights illuminated on the dashboard
  • •Difficulty starting the vehicle

Diagnostic Steps

  1. 1Inspect the battery terminals for corrosion or loose connections.
  2. 2Use an OBD-II scanner to check for any stored error codes.
  3. 3Test the battery voltage with a multimeter to ensure it is within the proper range (12.4V to 12.7V when the vehicle is off).
  4. 4Inspect the alternator output while the engine is running (should be between 13.7V and 14.7V).
  5. 5Check the vehicle's fuses related to the dashboard lighting and electrical system for any blown fuses.
  6. 6Examine the wiring harness and connectors for any signs of damage or wear.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Safety goggles and gloves should be worn.
  • Disconnect the vehicle battery to prevent electrical shock.

2. Clean Battery Terminals

  • Remove the battery cables (negative first, then positive).
  • Inspect for corrosion; clean terminals using a wire brush and baking soda solution if necessary.
  • Reattach the battery cables securely.

3. Replace Blown Fuses

  • Locate the fuse box (typically under the dashboard or in the engine compartment).
  • Identify and remove any blown fuses related to the dashboard lighting.
  • Replace with new fuses of the same amperage rating.

4. Test and Replace the Battery (if needed)

  • If the battery voltage is below 12.4V, it is likely weak and should be replaced.
  • To replace, remove the battery from the vehicle after disconnecting both terminals.
  • Install a new battery, ensuring proper connections and secure mounting.

5. Inspect and Repair Wiring

  • Carefully inspect the wiring harness for any frayed or damaged wires.
  • Repair any damaged wiring using electrical tape or replacement wiring as necessary.
  • Ensure that all connectors are clean and secure.

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
  • Wire brush
  • Socket set
  • Screwdriver set

Parts Required

  • Replacement fuses (as needed)
  • New battery (if necessary)

Additional Information

Component

Electrical

Repair Time

1-3 hours

Difficulty

medium

Severity

medium

Tools

5 items

Parts

2 items

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