why does my Volkswagen Passat B8 (2015-2022) interior lights stay on after closing the door

Solution

1. Preparation

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

2. Inspect and Replace Door Switches

• Tools Required: Screwdriver set, multimeter.
• Sub-steps:
  1. Remove the door panel carefully using a screwdriver and trim removal tools.
  2. Locate the door switch and disconnect the electrical connector.
  3. Use a multimeter to test the switch for continuity when pressed.
  4. If defective, replace the door switch with a new one.
  5. Reconnect the electrical connector and reassemble the door panel.

3. Check Wiring and Harness

• Tools Required: Wiring diagram, electrical tape, wire connectors.
• Sub-steps:
  1. Inspect the wiring harness running to the door for any visible damage.
  2. Use a wiring diagram to trace connections and ensure proper continuity.
  3. Repair any damaged wires using electrical tape or wire connectors.
  4. Secure all wiring to prevent future damage.

4. Test and Verify Functionality

• Tools Required: OBD-II scanner.
• Sub-steps:
  1. Reconnect the vehicle battery.
  2. Start the vehicle and observe the interior lights when closing the doors.
  3. If issues persist, re-scan the body control module for any remaining fault codes.