why does my Volkswagen Passat B8 (2015-2022) dashboard lights flicker when driving

Solution

1. Preparation

• Gather tools and safety equipment.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Clean Battery Connections

• Sub-steps:
  1. Remove the positive and negative battery cables using a socket set.
  2. Clean the terminals and cable ends with a wire brush until shiny.
  3. Reconnect the battery terminals securely.
• Tools Required: Socket set, wire brush.

3. Test and Replace Battery (if necessary)

• Sub-steps:
  1. Reconnect the battery and use a multimeter to check the voltage.
  2. If the battery voltage is below 12.4 volts, consider replacing it.
  3. Remove the old battery and install a new one, ensuring proper orientation and connection.
• Tools Required: Socket set, battery terminal cleaner.

4. Test and Replace Alternator (if necessary)

• Sub-steps:
  1. Start the engine and measure alternator output with a multimeter.
  2. If the voltage is outside the 13.5 to 14.5 volts range, the alternator may need to be replaced.
  3. Disconnect the battery and remove the alternator, following manufacturer guidelines.
  4. Install a new alternator and reconnect the battery.
• Tools Required: Socket set, torque wrench, possibly a serpentine belt tool.

5. Inspect Wiring and Fuses

• Sub-steps:
  1. Check all relevant fuses related to dashboard lights for continuity and replace any that are blown.
  2. Visually inspect wiring harnesses for any signs of wear or damage, and repair as necessary.
• Tools Required: Fuse puller, multimeter, electrical tape.