Thanks guys. The way it's wired is:
Relay terminal 30: power from the fuse block, 25 amp circuit (about the only vacant wire left).
Relay terminal 87: to fuel pump.
Relay terminal 85: ground.
Relay terminal 86: 12v from the ECU.
The ECU triggers the relay, that way the pump doesn't run if the engine is not on. I have another idea for the cutoff switch, not off the relay. I like the rubber mount idea on the pump. Right now it's bolted to the frame, which probably makes it loud. Ash, I might have the truck done enough to bring to the meeting. I wouldn't mind finding out how many amps the pump pulls.