my Volkswagen Tiguan won’t start and the dashboard lights are flickering what could it be

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. Inspect the Battery

• Sub-steps:
  1. Remove the battery terminals (negative first, then positive).
  2. Clean any corrosion from the terminals using a wire brush and a mixture of baking soda and water.
  3. Reconnect the terminals securely, ensuring they are tight.

3. Test and Replace the Battery (if necessary)

• Sub-steps:
  1. Use a multimeter to measure the battery voltage. If it is below 12.4 volts, charge the battery.
  2. If the battery fails to hold a charge, replace it with a new, compatible battery (e.g., OEM specifications).
  3. Install the new battery, ensuring the positive terminal is connected first.

4. Examine and Test the Starter Motor

• Sub-steps:
  1. Locate the starter motor and disconnect its electrical connector.
  2. Use jumper cables to connect the starter directly to the battery to test its functionality.
  3. If the starter does not engage, it will need to be replaced.

5. Check the Ignition Switch and Wiring

• Sub-steps:
  1. Inspect wiring connected to the ignition switch for frays or breaks.
  2. Test the ignition switch with a multimeter to ensure it is functioning correctly.
  3. Replace the ignition switch if it shows signs of failure.