1995 Chevy Suburban wont start

I have a 1995 suburban, that wont start. It had an intermit problem of cutiing off during turns, and body movement. At one point if you turned the steering wheel it would cut off while in park.

I have changed the fuel pump, filter, the computer, the throttle body, tps, Steering colomun, Dash wiring harness, no result.

I have jumped a wire from the fuel pump to fuse box with the key in the on Position and it will start, with out it, the vehicle will not turn over.

any ideas, could the wires at the fuel pump be the problem.