* Haynes or Chilton Repair Manual: These manuals are readily available online and at auto parts stores. They usually have detailed wiring diagrams, often color-coded, specifically for your year and model Suburban. This is generally the best and most reliable option.
* Factory Service Manual (FSM): These are the most comprehensive manuals, directly from General Motors (GM) when they were new. Finding one for a 1985 model might be challenging, as they're often rare and can be expensive. You might find one through online used parts sites or classic car forums.
* Online Forums: Websites and forums dedicated to classic Chevy trucks and Suburbans (like forums at sites like Chevrolet Forum, ClassicCars.com, etc.) are a great place to ask for help. Someone with a similar vehicle might have a scan of the relevant diagram they can share. Be sure to specify your engine type and any relevant options.
* Online Parts Websites: Some online parts websites, like AutoZone or Advance Auto Parts, may have limited wiring diagrams available, though usually not as detailed as a repair manual. Enter your vehicle's information and see if they have any relevant electrical schematics.
Important Note: When working with car wiring, always disconnect the negative battery terminal before starting any work to prevent accidental short circuits or damage to your vehicle's electrical system. If you're not comfortable working with car wiring, it's best to consult a qualified mechanic.
