* Online Forums and Communities: Websites dedicated to classic car restoration, Pontiac enthusiasts, or vintage car mechanics (like forums on sites like ClassicCars.com, Hemmings.com, or Pontiac-specific forums) are your best bet. Posting a request for the diagram, along with your Catalina's engine type (e.g., 389, 389 Tri-Power, etc.), will likely yield helpful responses from knowledgeable members who may have scanned diagrams from original manuals.
* Online Parts Suppliers: Some larger online parts suppliers specializing in classic car parts might offer wiring diagrams as downloadable PDFs or included with a parts catalog purchase (often for a fee). Search their websites for "1962 Pontiac Catalina wiring diagram."
* eBay or Similar Auction Sites: You might find a scanned copy of a factory service manual or wiring diagram on eBay or a similar auction site. These can be quite valuable resources, though they may vary in quality.
* Local Libraries or Archives: Your local library's automotive section might possess old repair manuals or technical books that include the diagram. Alternatively, larger libraries or archives might have access to historical automotive documents.
* Classic Car Clubs: Contacting local or national Pontiac car clubs could put you in touch with someone who has the relevant information or a copy of the original wiring diagram.
Important Note: Remember that alternator wiring can vary slightly depending on the specific options and equipment installed on your particular Catalina. Specifying the engine size and any specific alternator details you can find (manufacturer, part number, etc.) will significantly aid in your search. If you can locate a shop manual for your year and model, it will contain the most accurate and detailed wiring diagrams.
