1998 Chevy Suburban fuel pump

Hi, Your system shows to have an oil pressure switch in the fuel pump circuit, wired in parallel to the relay. As long as that circuit is functional, you can unplug the relay, the vehicle should still start and run. If I know a short is on a long wiring circuit, I don't hunt the short, I clip the wire at both ends and splice in a new wire. That will work, if no branches off the circuit. I wouldn't think your rewiring would cause your issue, can't be sure?