Here are some places where you might find some information, but be prepared to potentially pay for a full, reliable diagram:
* Online forums and communities: Websites and forums dedicated to classic Chevrolet trucks (like forums specific to the 1972 model year or C/K series trucks) are a good starting point. Members may have scanned sections of a wiring diagram or have experience that can help you troubleshoot, even if they don't have a complete diagram to share.
* eBay or similar auction sites: You might find someone selling a digital copy of a wiring diagram or a reproduction of a shop manual containing the diagram.
* Online parts retailers: Some online retailers specializing in classic car parts might offer wiring diagrams for purchase.
* Classic car parts catalogs: Companies that specialize in parts for classic Chevrolets often have catalogs (sometimes available online) that might include partial wiring schematics or at least help you identify specific components and their locations.
* Local libraries: Your local library may have access to old repair manuals through an interlibrary loan system.
Why aren't free, complete diagrams readily available?
Creating accurate wiring diagrams requires significant time and expertise. Copyright protection on these diagrams is common. Companies that publish them invested resources in their creation, and they sell them to recoup those costs.
Remember, using an inaccurate or incomplete wiring diagram can be dangerous. If you're working on your truck's electrical system, proceeding with caution and using multiple resources to verify information is highly recommended. Consider investing in a reliable reproduction of the factory service manual; it's a valuable resource for any classic car owner.
