I am having a fuel pump issue. If I run a wire from the battery to the pump it will run. My question is the grey wire at the harness is the power right? If I run a new power and ground should I leave the grey wire separate and just go to the fuel pump or does that grey wire need power too? Also is there a spot that I can tie into the fuse block and relays under the hood so it would not stay on all the time or do I just need to put in a switch?