* Haynes Repair Manual or Chilton Repair Manual: These are readily available at auto parts stores and online retailers. They typically include detailed wiring diagrams. Make sure you get the one specifically for a 1987 F-150.
* Ford Parts Dealer: A Ford dealership might have access to digitized schematics or old printed versions, though they may charge a fee for copies. This is your best source for accurate information, but potentially the most expensive.
* Online Forums: Websites and forums dedicated to Ford trucks (like Ford-trucks.com or similar) often have members who might have scanned copies or have access to the diagrams and would be willing to share them. Searching for "1987 F-150 wiring diagram" on these sites is a good starting point. Be aware that information found online isn't always guaranteed to be accurate.
* eBay or similar auction sites: You might find a used repair manual with the diagrams on eBay or other online marketplaces.
Important Note: Wiring diagrams can be complex. If you're not comfortable working with automotive electrical systems, it's best to consult a qualified mechanic. Incorrect wiring can lead to serious damage or injury.
