* Haynes or Chilton Repair Manuals: These manuals are often available at auto parts stores or online retailers like Amazon. They typically include wiring diagrams, though they may not be as detailed as a factory service manual. Keep in mind that the level of detail varies between manuals.
* Factory Service Manual: These are the most comprehensive but also the most difficult to find. You might have luck searching online used booksellers (eBay, Amazon used books), classic car parts websites specializing in Ford, or forums dedicated to classic Ford trucks. These manuals are often expensive.
* Online Forums: Forums dedicated to Ford trucks, particularly those focusing on 1970s models, are a good resource. Members may have scanned sections of diagrams or have links to shared resources. However, the quality and accuracy of information found here can vary widely, so always cross-reference with other sources.
* Local Libraries/Colleges: Some larger libraries or technical colleges may have access to older repair manuals or automotive databases.
Important Considerations:
* Variations: Wiring diagrams can vary based on options (e.g., different engines, transmissions, accessories). Make sure the diagram you find matches your truck's specific configuration.
* Accuracy: Always double-check any wiring information before working on your vehicle's electrical system. Incorrect wiring can lead to damage or injury.
Your best starting point is likely a Haynes or Chilton manual, then supplement with information found online forums if needed. Be patient and persistent in your search—finding a complete diagram might take some time.
