* Factory Service Manuals: These are your best bet. A 1970 Pontiac Firebird service manual will contain detailed wiring diagrams for the entire car, including the dashboard. You can try searching online retailers like eBay or Amazon for a physical copy or a digital download (PDF). Look for manuals specifically mentioning "wiring diagrams" or "electrical schematics."
* Online Forums and Communities: Dedicated Pontiac or Firebird forums (like those on sites like forums.com or dedicated car enthusiast sites) may have members who have scanned sections of their service manuals or have created their own diagrams. Search the forums using keywords like "1970 Firebird dash wiring diagram" or "70 Firebird instrument panel wiring." Be prepared to sift through many posts.
* Haynes or Chilton Manuals: While not as detailed as factory service manuals, Haynes and Chilton repair manuals sometimes include simplified wiring diagrams. These are more readily available but may not have the level of detail you require for a specific dash component.
* Specialised Automotive Parts Suppliers: Some suppliers specializing in classic car parts might have access to wiring diagrams or be able to point you to a resource.
Important Considerations:
* Variations: Wiring diagrams can vary slightly based on options (e.g., different gauge packages, air conditioning). Make sure you find a diagram that matches your Firebird's specific equipment. The VIN number is critical for identifying the correct specification.
* Diagram Complexity: Dash wiring is intricate. Even with a diagram, deciphering it can be difficult. Having basic electrical knowledge is helpful.
* Safety: Working with car wiring requires caution. Disconnect the battery's negative terminal before starting any work to avoid electrical shocks or short circuits.
Finding a specific dash wiring diagram will require some dedicated searching. Start with the factory service manual – it's the most reliable source.
