Is the problem with your fuel pump, that it won't turn on?
Have you checked the reset button on the inertia switch?
The Inertia Switch is located at the far Left part of the toe-board, near the parking brake assembly. There is a button on the top of it that you press in, to reset it.
A sizeable impact will trip the reset button on the inertia switch and shut down the fuel pump.
You weren't very specific a to what kind of problem you were having with the fuel pump, so I am guessing.