where is the fuel pump located on a 1990 toyota corolla?

The fuel pump is inside the gas tank here is how to change it out. Check out the images (below). Let us know if you need anything else.

Before you write off the pump, short B+ and Fp pins on the diagnostic port. If pump runs, then the problem is a relay/fuse/wiring.
If pump does not run, then pump is bad.

I agree..