Volkswagen wiring diagrams provide schematic and wiring instructions for the electrical system of a Volkswagen vehicle. They use symbols to represent the components in a wiring diagram and provide numbered connections between them. They show how a circuit works and the components used in it. Wiring diagrams are essential for troubleshooting electrical issues. They can be helpful for diagnosing and repairing a faulty sensor, switch, wire, or other component. They can also be used to determine the correct wire gauge and routing when installing new components or systems.