Need wiring diagram on 1990 chevy Beretta GT 3.1 L V6

[LisaMartinez]

Really need complete wiring diagram 1990 Chevy Beretta GT 3.1 liter V6 also need to know where my RPM signal comes from to give the PCM ground? And is there anyway I can check the injector pulse from the PCM or the injector connector with a test light???

[3X00-Modified]

Moved topic to appropriate section.