Volkswagen Golf Seventh Generation (2013-2020) won't start after sitting how to troubleshoot

Solution

1. Battery Inspection

• Sub-steps:
  • Disconnect the negative terminal first, followed by the positive terminal.
  • Clean any corrosion from the terminals using a wire brush.
  • Reconnect the terminals securely, ensuring a tight fit.

2. Battery Replacement (if necessary)

• Sub-steps:
  • Remove the old battery by unscrewing any hold-down brackets.
  • Lift the battery out of the tray carefully.
  • Place the new battery in the tray and secure it with the hold-down brackets.
  • Reconnect the positive terminal first, followed by the negative terminal.
• Tools Required: Socket set, wire brush
• Safety Warnings: Always wear gloves and safety goggles when handling batteries.

3. Starter Motor Test

• Sub-steps:
  • Locate the starter motor, usually positioned near the transmission.
  • Use a jumper wire to connect the positive terminal of the battery directly to the starter terminal.
  • If the starter engages and the engine cranks, replace the ignition switch or wiring.
• Tools Required: Jumper wires, socket set
• Safety Warnings: Ensure the vehicle is in neutral or park to prevent accidental movement.

4. Fuel System Check

• Sub-steps:
  • Locate the fuel pump fuse and inspect it; replace if blown.
  • If the fuse is intact, check the fuel pump relay and replace if faulty.
  • Disconnect the fuel line and check for fuel delivery when the ignition is turned on; use a fuel pressure gauge if necessary.
• Tools Required: Fuel pressure gauge, socket set
• Safety Warnings: Always work in a well-ventilated area and have a fire extinguisher nearby when working with fuel systems.