1. Online Automotive Repair Manuals: Sites like AllDataDIY, ChiltonDIY, and Mitchell 1 (often require a subscription) usually have detailed repair manuals including vacuum diagrams. These are the most reliable sources.
2. Haynes or Chilton Repair Manuals: Check your local auto parts store or online retailers like Amazon. These manuals are cheaper than subscriptions but might have less detail. Look for one specifically for a 1996 Ford Probe.
3. Ford Dealerships: While unlikely to give you a diagram directly, they might be able to point you towards a parts catalog or a repair manual source.
4. Online Forums: Search on forums dedicated to Ford Probes or Mazda vehicles (since the Probe was built in partnership with Mazda). Someone might have scanned a diagram or know where to find one. Be cautious about the accuracy of information found here.
5. Used Parts Stores: A local used parts store that specializes in older vehicles might have a workshop manual containing the diagram.
Important Note: Before attempting any vacuum line repairs, carefully inspect the entire system. Leaks, cracks, and deteriorated hoses are common causes of vacuum issues. Taking pictures of the existing system *before* disconnecting anything is extremely helpful for reassembly. Using a vacuum gauge can help you identify problems systematically.
