Sun Tach Wiring Diagram. Step 1 connect the black wire to a clean unpainted ground using a ring terminal or other safe grounding means. I just purchased a used sun super tach ii it has 4 leads coming out of it.
The other thing that you will discover a circuit diagram could be traces. Step 2 connect the red wire to any battery harness that provides power when the power is in the on position. For chrysler blue gold and silver boxes ford standard electronic ignitions and most other oem standard cd and electronic ignitions.
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What i would do is ground the case then try hooking one of the other wires up to the tachometer terminal and look for function of the tachometer. Csi automotive sales service parts. Red 12 volts blackground brown or green distributor blue or yellowdimmer. Vintage sun tachometer model rc 50 gauge hot rat rod red football tach 5000 rpm.