To find it, you'll need to:
1. Consult your owner's manual: This is the best source for a diagram of your fuse box, showing the location of relays and fuses. It will likely identify a relay or fuse related to the fuel pump, possibly labeled "Fuel Pump", "EFI", "Main", or something similar.
2. Look for a diagram inside the fuse box lid: Many fuse boxes have a diagram printed on the inside of the cover. This diagram will show the location and function of each fuse and relay.
3. Use a multimeter: If you can't find the correct relay from the diagrams, use a multimeter to test circuits associated with the fuel pump when the ignition is switched on. This is more advanced and requires some electrical knowledge.
Important Note: Working on fuel system components can be dangerous. If you're not comfortable doing this yourself, it's best to take your vehicle to a qualified mechanic. Incorrectly handling fuel system components can lead to fire or explosion.