The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Wiring for Alternator, HEI, Lights, Fuel Pump

lutronjim · 06-09-2021, 09:37 PM

I had an overdrive that I put in my 70 C10. In my points type dizzy there was a wire from the dizzy side of the coil that stopped the engine momentarily for the overdrive to shift.

When I upgraded to a HEI a mechanic friend help me wire it up. He simply put the wire on the tach terminal and it worked fine. I don't know why but I ran that way for several years. I didn't have a tach so I don't know how that would work. As I remember he said it just stops the engine for a partial revolution.

06-09-2021, 09:37 PM	#3
lutronjim Registered User Join Date: Dec 2013 Location: Dunwoody,Ga Posts: 443	Re: Wiring for Alternator, HEI, Lights, Fuel Pump I had an overdrive that I put in my 70 C10. In my points type dizzy there was a wire from the dizzy side of the coil that stopped the engine momentarily for the overdrive to shift. When I upgraded to a HEI a mechanic friend help me wire it up. He simply put the wire on the tach terminal and it worked fine. I don't know why but I ran that way for several years. I didn't have a tach so I don't know how that would work. As I remember he said it just stops the engine for a partial revolution.