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Well heres my questions does anyone know what pin at the pcm the tach wire is or can I just find it in the harness behind the cluster and what color it is. I need to find a tach reference for my NOS controller # 15975NOS Im trying to do it with out using a tone ring on the alternator. The other...

Well I need a little help on this one I have to find a tach reference for my NOS Controller # 15975NOS I would like to do it with out using a tone ring So my questions are does anyone know what pin number the wire is at the pcm an what color it is and if its 4 or 8 pulses I would think is 4...