my Volkswagen Golf MK7 (2015-2019) interior lights stay on even when the doors are closed

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a flat surface and properly supported.

2. Inspect and Test Door Switches

• Sub-steps:
  1. Locate each door switch; typically found in the door frame.
  2. Remove the door panel if necessary to access the switch.
  3. Disconnect the wiring harness from the switch.
  4. Use a multimeter to test the switch for continuity when activated.
  5. Replace any faulty switches with new components.

3. Check and Replace Fuses

• Sub-steps:
  1. Locate the fuse box, typically under the dashboard or in the engine bay.
  2. Identify the fuse for the interior lights (refer to the owner's manual).
  3. Remove the fuse using a fuse puller or pliers and inspect it visually.
  4. Replace with a new fuse of the same amperage if blown.

4. Inspect Wiring and Connections

• Sub-steps:
  1. Visually inspect the wiring harnesses around each door for frays or disconnections.
  2. Repair any damaged wires with electrical tape or replace as necessary.
  3. Ensure all connectors are secure and free of corrosion.

5. Reassemble and Test

• Sub-steps:
  1. Reconnect any removed components, including door panels and switch wiring.
  2. Reconnect the negative battery terminal.
  3. Test the function of the interior lights with all doors closed to ensure proper operation.