* The Volkswagen Repair Manual. This is the official manual published by Volkswagen and is available for purchase from Volkswagen dealerships or online retailers.
* Haynes Auto Manuals and Chilton Auto Manuals. These are popular aftermarket repair manuals that include wiring diagrams for many vehicles, including the Volkswagen Golf.
* Online forums and websites. There are several online forums and websites dedicated to the Volkswagen Golf, and some of these may have wiring diagrams available for download.
* The Volkswagen dealership. The Volkswagen dealership may be able to provide you with a wiring diagram for your vehicle, but this may come at a cost.