my Volkswagen Golf MK7.5 (2020-Present) won't start and just clicks what should I check

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is in a safe, well-ventilated area.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Battery Inspection and Replacement

• Sub-steps:
  1. Remove the battery terminals, starting with the negative terminal, followed by the positive terminal.
  2. Clean any corrosion from the battery terminals using a wire brush and a mixture of baking soda and water.
  3. Test the battery with a multimeter; if the voltage is below 12.4 volts, charge or replace the battery.
  4. If replacing, install the new battery by connecting the positive terminal first, followed by the negative terminal. Ensure they are securely tightened.

3. Starter Motor and Relay Inspection

• Sub-steps:
  1. Locate the starter motor (typically near the transmission).
  2. Check the electrical connections to the starter for tightness and cleanliness.
  3. Test the starter relay; if faulty, replace with a new relay.
  4. If necessary, remove the starter motor for testing or replacement. Use a socket set to unbolt it, disconnect the wiring, and install a new starter if needed.

4. Verify Ignition Switch Operation

• Sub-steps:
  1. Remove the steering column cover to access the ignition switch.
  2. Check for loose connections and ensure the switch operates smoothly.
  3. If the switch is faulty, replace it with a new ignition switch.