To find it, you'll need to:
1. Locate the underhood fuse box: This is usually a large black plastic box located near the battery, often on the driver's side.
2. Open the fuse box: There's usually a cover that either lifts off or swings open. You may need a tool to release the clips holding it shut.
3. Consult your owner's manual: Your owner's manual will have a diagram showing the location of all the relays and fuses within the box. This is the BEST way to identify it. The relay may be labeled, or you might find it listed with its circuit description (e.g., Fuel Pump).
4. Look for a relay that matches the description: If your owner's manual doesn't show a clear fuel pump relay, look for a relay that is likely to control the fuel pump. This often involves a process of elimination and possibly testing with a multimeter (to see if power is going to it when the ignition is on).
Important Note: If you're not comfortable working with automotive electrical systems, it's best to have a qualified mechanic locate and replace the relay for you. Incorrectly handling relays or fuses can damage your vehicle's electrical system.