Wiring Diagram For Finished Tachometer

Here is the simple wiring diagram for the tach. Seems easy once it's all over. I guess like after the invention of the wheel or the screw. Make sure, 6 teeth evenly spaced and a sensor like this Cherry that generates what I call a square wave not a analog wave.
Wiring Diagram For Original Tachometer  EV 1989 Saturn SL1Wiring Diagram For Original Tachometer EV 1989 Saturn SL1