Gm Hei Tachometer Wiring Diagram. The second diagram shows where the wires go when converting to hei. The other is a wire that supplies power from the starter solenoid r terminal it supplies power only when.
In response to jdsurge. One of the other wires is a signal wire. If you look at the top of the hei distributor it has a label on it that says bat and tach.
If you look at the top of the hei distributor it has a label on it that says bat and tach.
Do not start the engine. With a gm hei 7 pin and 8 pin modules the ignition module wires you need to know about are. Bureaucraticallyfo s m l f. White red black green.