my Volkswagen Tiguan won't start but lights are on what could be wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

Tools Required:

• Multimeter
• Socket set
• Screwdrivers
• OBD-II scanner

2. Battery Inspection

• Clean battery terminals with a wire brush if corrosion is found.
• Tighten any loose connections.
• If the battery voltage is low, jump-start the vehicle or replace the battery if it fails to hold a charge.

3. Starter Motor Inspection

• Locate the starter motor under the vehicle.
• Remove the electrical connections (negative first) and inspect for damage.
• If necessary, unbolt the starter motor from the engine block (typically 2-3 bolts).
• Replace the starter motor with a new one if it is determined to be faulty.

4. Ignition Switch and Relay

• If the starter motor checks out, inspect the ignition switch.
• Remove the steering column cover to access the ignition switch.
• Test the ignition switch with a multimeter to ensure it is functioning properly.
• If the switch is faulty, replace it.
• Confirm operation of the starter relay, replacing it if it is not functioning correctly.