To be sure:
1. Locate the Power Distribution Box: This is usually a large black plastic box under the hood, often near the battery.
2. Consult your owner's manual: The owner's manual will have a diagram of the fuse box showing the location of the fuel pump relay. This is the most reliable method.
3. Look for diagrams online: Many online resources, including Ford forums, provide diagrams of the 1993 Mustang fuse box layouts. Search for "1993 Ford Mustang fuse box diagram" to find one matching your engine. These diagrams often label relays. *Always double-check the year and engine size to ensure accuracy.*
Important Note: The fuel pump relay might be labeled differently than simply "Fuel Pump." It could be labeled something like "EFI Relay" or similar. Check the diagrams carefully.