To find it, you'll need to:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of all relays and fuses.
2. Check the underhood fuse box: This is the most common location. Look for a diagram on the inside cover of the fuse box. It might list the fuel pump relay by name or show its position by number.
3. Look for a separate relay box: If you don't find it in the main fuse box, look around for a smaller box containing additional relays. This is often found near the main fuse box.
4. Use a wiring diagram: If you can't locate it visually, a wiring diagram for your specific year and model Crown Victoria will be invaluable. You can find these online through automotive repair resources (often for a fee) or possibly at a local auto parts store. The diagram will show the relay's location and the wiring connected to it.
Important Note: Always disconnect the negative battery terminal before working with electrical components to prevent accidental shorts or injury.