To find it, you'll need to:
1. Locate the Power Distribution Box (PDB): It's usually a large black plastic box under the hood, often near the battery. The cover should have a diagram showing the fuse and relay positions.
2. Consult your owner's manual: This is the BEST resource. It will have a diagram specifically for your vehicle showing the fuse and relay positions, including any related to the fuel pump. The diagram will often identify the relay by its amperage rating or a specific number.
3. Look for a relay associated with the fuel pump: The relay may be labeled directly or indirectly (e.g., "Fuel Injection" or a similar description). It's often a larger relay, and you might have to trace wiring from the fuel pump to figure out which relay it is. This requires some electrical knowledge and may necessitate testing with a multimeter to ensure you've found the correct relay.
Caution: Working with car electrical systems can be dangerous. If you're not comfortable doing this, it's best to have a qualified mechanic locate and replace the relay.