why does my Volkswagen Golf MK7 (2015-2019) door ajar light stay on

Solution

1. Preparation

• Gather tools: multimeter, socket set, screwdriver set, and a repair manual for reference.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect Door Latches

• Remove the door panel using a screwdriver to access the internal components.
• Check the alignment of the door latch and striker; adjust if misaligned.
• Clean the latch mechanism to ensure it operates smoothly.

3. Test Door Ajar Switches

• Locate the door ajar switch, typically situated within the door latch assembly.
• Use a multimeter to check for continuity when the door is closed and opened.
  • If there is no continuity when the door is closed, the switch may need replacement.
• Document any faulty switches for replacement.

4. Repair or Replace Faulty Components

• If the door ajar switch is faulty, remove the old switch by unscrewing it from the latch assembly.
• Install the new door ajar switch, ensuring it is secure and properly aligned.
• Reconnect any wiring harnesses that may have been disconnected during the process.

5. Reassemble and Test

• Reinstall the door panel carefully, ensuring all clips and screws are secured.
• Reconnect the vehicle battery and test the system by opening and closing each door.
• Verify that the door ajar light turns off when all doors are closed.