* Online Parts Suppliers: Websites like Classic Parts of America, LMC Truck, or National Parts Depot (and similar) often have wiring diagrams available, sometimes for purchase, as part of their repair manuals or documentation. Search their sites specifically for your year and model truck. Be prepared to potentially pay a small fee.
* Haynes or Chilton Repair Manuals: These aftermarket repair manuals often include wiring diagrams. Check Amazon, eBay, or your local auto parts store. Specify "1972 Ford F-250" in your search.
* Ford Dealers (Long Shot): While unlikely, some older Ford dealerships might still have access to microfiche or scanned copies of older service manuals, which could include wiring diagrams. This is a low probability, but worth a call to a few local or regional dealerships, especially those with a history of servicing older trucks.
* Online Forums and Communities: Websites and forums dedicated to classic Ford trucks (e.g., Ford Truck Enthusiasts forums) are good places to ask for help. Someone in the community may have scanned a diagram or have a copy they'd be willing to share. Be polite and specific in your request.
Important Considerations:
* Variations: Wiring diagrams varied slightly depending on options (e.g., power windows, air conditioning). The diagram you find might not be *exactly* the same as your truck's, but it will be close enough to be helpful.
* Condition: Remember that these diagrams are often decades old. They may not be in pristine condition.
Start with the online parts suppliers – they're likely your most reliable and straightforward option. Remember to be very specific with your search terms to improve your chances of success.
