Electrical problem!

[gsx&gsxr]

I just bought this car and the problems I have found so far make me sad i paid way to much the problem is in the wiring the headlights the gauges anything that was put in caused a problem like my favorite the random bare speaker wire spliced off the ecu harness... ground was wired hot and most everything was wired in red or yellow 14 gauge wire... does anyone have a diagram of the ignition switch plug??