Your best bet is to:
1. Consult your owner's manual: This is the most reliable source. The manual should have a diagram of the fuse and relay boxes.
2. Check the fuse box under the hood: This is the most common location for relays. Look for a box near the battery, often with a cover. The cover itself usually has a diagram showing what each slot is for.
3. Check the fuse box inside the car (if applicable): Some vehicles have a secondary fuse box inside the cabin.
4. Look for a relay with markings indicating "Fuel Pump" or a related designation. Relays are usually square or rectangular with multiple pins.
5. If you can't find it visually, use a multimeter: Test the power going to the fuel pump. You can trace the wiring back to find the relay in the circuit. WARNING: Exercise caution when working with car wiring and electricity.
Because finding this information precisely online is difficult, consulting your owner's manual and then physically checking your car are the only definitive ways to locate the fuel pump relay.
