fuel pump relay question.

[BigrobDog]

I was going through all my wires and hooking them up trying to find the wires to the fuel pump relay. and next to the relay is a in line fuse 2 gray wires . and i know this is to be hot . but 1 side of fuse is hot and other is ground. is this because of the computer, so that when i start crankin ill loose the ground and complete to power on the otherside of fuse if not then ooooo wow, . whats happening can some one help are have a diagram.