John,

 

I don't have the pinouts, but I remember three wires.  I think two of the colors matched between my sensor on the mag and the wires coming from my JPI.  I called JPI with a question like, "Do I hook the green wire to the blue wire?"  And they said yes.  I don't have my cowl off right now so I can't check the colors.

 

I'm pretty sure Hall effect sensors have two wires that bring current to the sensor.  The third wire is the signal going back to the tach.

 

Mike Easley

Colorado Springs