my Volkswagen Passat B8 (2015-2022) dashboard lights are flickering

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Clean Battery Connections

• Sub-steps:
  • Remove the battery terminals (negative first, then positive) using a socket wrench.
  • Clean the terminals and battery posts with a wire brush to remove corrosion.
  • Reconnect the battery terminals (positive first, then negative) and tighten securely.

3. Test and Replace Alternator

• Sub-steps:
  • Reconnect the battery and start the engine.
  • Use a multimeter to measure the voltage at the battery terminals; it should read between 13.8 to 14.4 volts.
  • If the voltage is low, consider replacing the alternator.
  • Disconnect the battery and remove the alternator (consult the service manual for specific removal steps).
  • Install the new alternator, reconnect the battery, and test the output again.

4. Check and Replace Fuses

• Sub-steps:
  • Locate the fuse box (refer to the owner's manual for location).
  • Inspect fuses related to the dashboard and electrical components for any blown fuses.
  • Replace any faulty fuses with new ones of the same amperage.

5. Inspect Wiring and Connectors

• Sub-steps:
  • Visually inspect wiring harnesses leading to the dashboard for any signs of fraying or damage.
  • Secure or replace any damaged wiring as necessary.
  • Ensure that all connectors are seated properly and free of corrosion.