There's really no fuse for the pump. There is an inertia switch in the back, but it's function is different than a fuse. The relay is in a black box called the IRCM, located under the engine decal, above the radiator. When the ECU detects the engine cranking over, it activates the relay to power up the fuel pump. The pump positive wire is pink with a black stripe. In order to check the wiring, you'd have to disconnect the harness from the IRCM, and connect a jumper wire from the positive terminal of the battery to the terminal that leads to the pump. You'll hear fuel start to circulate through the fuel system, and as long as the engine is off, there will be no vacuum to the fuel pressure regulator, and all of the fuel will flow through the return line back to the tank. When the IRCM gets old, it will occasionally not operate when it's warm.