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

**bhap** · 06-13-2021, 08:21 PM

On the HEI, I think the idea is to use a relay to interrupt the Positive feed to the HEI instead of grounding the tachometer. On points ignitions, it's ok to ground the coil to kill engine momentarily so overdrive can disengage for the "kick-down".

Christian, do you know if the resistor wire is only on the engine side of the firewall connector? I'm thinking of installing a regular wire on the engine side to trigger my HEI relay.

On the fusible link, that is a good idea to use a 16 gauge since the wires on the inside of the connector are most likely 12 gauge.

Thanks for the help, I'm going to get started wiring this up.

06-13-2021, 08:21 PM	#5
bhap Senior Member Join Date: Mar 2006 Location: Pittsburgh, PA Posts: 241	Re: Wiring for Alternator, HEI, Lights, Fuel Pump On the HEI, I think the idea is to use a relay to interrupt the Positive feed to the HEI instead of grounding the tachometer. On points ignitions, it's ok to ground the coil to kill engine momentarily so overdrive can disengage for the "kick-down". Christian, do you know if the resistor wire is only on the engine side of the firewall connector? I'm thinking of installing a regular wire on the engine side to trigger my HEI relay. On the fusible link, that is a good idea to use a 16 gauge since the wires on the inside of the connector are most likely 12 gauge. Thanks for the help, I'm going to get started wiring this up.