* Owner's Manual: Most car owner's manuals include diagrams showing fuse box locations, fluid locations (oil, coolant, etc.), and sometimes basic system schematics.
* Repair Manuals (Haynes, Chilton, etc.): These manuals are specifically designed for car repairs and contain extensive diagrams, including wiring diagrams, engine diagrams, and component layouts. You can usually find these at auto parts stores or online retailers.
* Online Databases: Websites like AutoZone, Advance Auto Parts, and others often have online parts catalogs which include diagrams to help you identify the correct part. These diagrams aren't always full system diagrams, but they often show the location of parts within a system.
* Manufacturer Websites: Some car manufacturers provide online resources, including diagrams, for their vehicles. The availability varies widely by manufacturer and model year.
* Technical Schools/Colleges: Automotive technology programs at schools and colleges will have access to extensive diagrams and schematics.
* eBay/Used Parts Websites: Sometimes diagrams are included in listings for used parts, especially if the seller is trying to help buyers identify what they're getting.
The best place to find a diagram will depend on what kind of diagram you're looking for (wiring, engine, suspension, etc.) and the make, model, and year of your car. Be as specific as possible when searching.