Well, you're lucky, I'm not playing golf all week; so I'll help you research.
First thing would be to jump the fuel pump wires.
Without checking, I'm gonna assume your '90 is like my '91.
Look just to the right of the brake master cylinder; you should see a retangular box bigger than a pack of cigarettes.
It should say MAS on it, and have a big plastic wingnut on the top.
Turn the wingnut Counterclockwise all they way, and just lift the MAS relay out and put it in a safe spot.
The pins underneath are numbered, you want sockets 1&2, the big ones closest to the brake reservoir.
Find a thick piece of insulated wire, and carefully short out sockets 1&2.
Don't need the key on or anything.
The fuel pump should run.

If it does run, then chances are you have a bad MAS relay.

If the pump does not run, then you have a bad pump or wiring.

I'll do a bit of memory jogging and get back to you. Seems if I don't work on something for a few months, these days I forget the details. Just got my Medicare card, so I guess I have a good excuse.

Let me know if the jumper worked.

DG