Generally, it's located in one of these areas:
* Under the hood in the fuse box: This is a common location, often in a panel near the battery.
* Inside the passenger compartment fuse box: Some models place it inside the car, usually under the dashboard.
The relay itself might be labeled, or you may need to use a wiring diagram to identify it. Searching online for "[Your Mustang's Year and Model] fuel pump relay location" will likely yield diagrams and forum posts showing its exact placement.
