Convert Hei Distributor Wiring Diagram

Variety of gm hei distributor wiring schematic. When converting from a points style distributor to an hei unit on most 1970 and earlier vehicles its a good idea to run a new 12 gauge wire from the bat terminal in the hei distributor cap.

The second diagram shows where the wires go when converting to hei.

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Convert hei distributor wiring diagram. A wiring diagram is a streamlined conventional pictorial depiction of an electrical circuit. Hei coils and ignition systems must be powered with 12 volts to work properly. That way if the msd box fails it would only require a few simple wiring connections to hook up the hei module.

Replace the resistance wire that ran to your points system from the fuseblock with a 12guage wire pink insulated if you want to remain factory compliant and hook it up to. Wiring for typical hei ignition system. Then even with a cd ignition in the car you can also keep that small aluminum hei module plate as a backup.

Weve included a simplified wiring diagram to. The second diagram shows where the wires go when converting to hei. Note that the new hei power wire can be connected to the bulkhead connector as described in the above paragraph or it can be routed to the ign terminal found on most fuse panels.

How to wire an hei distributer. Tips and step by step procedures for retrofitting an hei distributor in your gm engine. It reveals the elements of the circuit as simplified shapes and the power as well as signal links between the tools.

The ballast resistance must be removed from the circuit to make sure 12 volts reaches the hei system. Note that the new hei power wire can be connected to the bulkhead connector as described in the above paragraph or it can be routed to the ign terminal found on most fuse panels. How to make plug wires for your hei distributor video.

The first diagram shows a typical stock points system. If you have an amc a ford or a chrysler distributor with a magnetic pickup its really easy to convert to a standard four pin gm hei module. So your ready to wire up an hei.

Heres the summary in a nutshell. In fact msd makes a slick wiring adapter to convert your distributor to the small two pin msd connector. Wiring for typical points ignition system.

Wiring for typical points ignition system. Hei wiring conversion needs. Powering them through the original wiring will mean that the ballast resistance will still be present.

Craig darpino from american autowire shows how to properly wire an hei distributer.