what causes my Volkswagen Golf MK7 (2015-2019) headlights to flicker while driving

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Battery Inspection

• Sub-steps:
  • Inspect battery terminals for corrosion or loose connections.
  • Clean terminals with a wire brush and a mixture of baking soda and water if corrosion is present.
  • Tighten any loose connections.

3. Alternator Testing

• Tools Required: Multimeter
• Sub-steps:
  • Reconnect the battery terminal.
  • Start the engine and use a multimeter to measure the voltage at the battery terminals.
  • If the voltage is outside the range of 13.7 to 14.7 volts, the alternator may need replacement.

4. Headlight Bulb and Wiring Inspection

• Sub-steps:
  • Remove the headlight assembly according to the vehicle’s manual.
  • Check the bulbs for any signs of damage; replace if necessary.
  • Inspect the wiring harness for frayed wires; repair or replace as needed.

5. Relay Replacement

• Tools Required: Socket set
• Sub-steps:
  • Locate the headlight relay in the fuse box.
  • Remove the old relay and replace it with a new one.
  • Ensure the relay clicks into place securely.