You might want to consider installing a "Ford Inertia Switch" in your fuel pump circuit. The switch "opens" if a severe enough impact is encountered, and disables the fuel pump. I wired mine in the power feed to my fuel pump. My fuel pump only draws a couple of amps (12 volt), so I didn't incorporate a relay. You can find them at your local "Pick & Pull" in Ford Explorers, Rangers, etc. behind the passenger side kick panel. If the switch should ever "trip", there is a reset button to restore operation. I've never had a "nuisance trip" with mine, and it provides an extra safety factor in the event of a collision.