* Factory Service Manual: This is the most comprehensive source. You might find a used one on eBay, Amazon, or through online used parts sellers. Search for "1996 Chevrolet Caprice Wagon factory service manual." These manuals usually contain very detailed wiring diagrams.
* Haynes or Chilton Repair Manual: These are less expensive alternatives to the factory manual, but the wiring diagrams might be less detailed. Search for "1996 Chevrolet Caprice Wagon Haynes manual" or "1996 Chevrolet Caprice Wagon Chilton manual" on the same online marketplaces.
* Online Forums: Websites dedicated to classic Chevrolet or Caprice owners may have members who have scanned and shared sections of their wiring diagrams. Try searching forums like ImpalaSSForum.com (even though it's Impala SS focused, the Caprice shares many components), or general automotive forums. Be aware that the quality and accuracy can vary greatly.
* Local Auto Parts Store: Some auto parts stores (like AutoZone or NAPA) might have access to wiring diagrams through their computer systems, particularly if you have your VIN number. It's worth asking, though they might charge a small fee.
* Professional Mechanic: A mechanic specializing in older vehicles would likely have access to wiring diagrams through their subscriptions to repair information databases. They might be willing to help you for a fee.
Remember to always disconnect your battery's negative terminal before working with any automotive wiring to prevent short circuits and damage. Working with car wiring can be dangerous if you're not experienced; if you're unsure about anything, seek professional help.
