how to fix the rear lights not working on Volkswagen Passat B8 (2015-2022)

Solution

1. Preparation

• Gather tools and parts.
• Ensure the vehicle is parked on a level surface with the ignition off.
• Disconnect the negative terminal of the battery to prevent electrical shorts.

2. Inspect and Replace Bulbs

• Remove the rear light assembly:
  • Unscrew the retaining screws using a socket set.
  • Gently pull the light assembly out from the body of the vehicle.
• Remove the old bulbs:
  • Twist the bulb socket counterclockwise to remove it from the assembly.
  • Pull out the burnt-out bulb and replace it with a new one ensuring it is the correct type.
• Reassemble the light assembly:
  • Insert the bulb socket back into the assembly and twist clockwise to secure.
  • Position the light assembly back into the vehicle and secure with screws.

3. Check and Replace Fuses

• Locate the fuse box (typically under the dashboard or in the engine compartment).
• Remove the appropriate fuse for the rear lights using a fuse puller.
• Inspect the fuse for a break in the filament; replace if necessary with a fuse of the same amperage.

4. Test and Replace Brake Light Switch

• Locate the brake light switch, typically found above the brake pedal.
• Disconnect the wiring harness from the switch.
• Test the switch for continuity using a multimeter by pressing the brake pedal.
• If faulty, remove the old switch:
  • Unscrew the retaining nut or clip securing the switch.
  • Install the new switch and reconnect the wiring harness.

5. Inspect Wiring and Connectors

• Visually inspect the wiring harness for any signs of fraying or damage.
• Clean any corroded connectors with electrical contact cleaner.
• Repair any damaged wiring or replace connectors as necessary.