Fuel Pump Relay Location/Label

I have an '02 Prius. I took off the negative cable off the the battery while replacing my front speakers. After I hooked my battery back up, I tried to start my car and the fuel gauge was saying that I was empty (but I have a full tank of gas). The check engine light and the warning light came on. The engine will start, but then turn off a few seconds later and won't kick back in when I press the gas pedal. I still have full battery power after the gas engine shuts off (I can play the radio and my headlights work), but no movement from the electric engine. Someone mentioned that it might be my fuel pump relay, but I can't seem to locate it. Do any of you know what the fuel pump relay is labeled as in the box or possibly have any insight as to what my problem might be? Thanks in advance.