1988 Ford Bronco Fuel Pump/Computer

Electrical problem
1988 Ford Bronco 6 cyl Two Wheel Drive Manual

I"m without a vehicle because, to make the story short, my inertia switch on the bronco II kept getting hot and tripping so I just wired it together. Well, I was dropping my friend/babysitter off and I guess the tape fell off of the wires because we both saw sparks by her foot and the truck just DIED in mid-traffic never to start again. (Her shoe touched the bare wires or something)

Before it had to be towed away from my rented property, I have checked the relays (switched out with good ones) fuses, and listened to the pump--which does the usual short whine when it comes on. I checked the only fuseable link I could find, coming from the negative battery line. What I am guessing is the computer got spiked. When I try to crank it, the engine turns but that is it. No fuel is getting to it.

What I want to know is what is the black box behind the driver's seat (on the wall) control? I cannot afford a book right now and my car was towed to the junk yard. Is it likely the computer(s) got fried or do I need to replace one of the fuel pumps?

I have basic tools, I am low on money and a single mom that doesn't know a lot about cars so I would greatly appreciate any help at all, even just links in the right direction. I cannot afford a mechanic. Thank you so much in advance to anyone who helps with this.