GM 4-Pin HEI Electronic Ignition Control Module Wiring Connections/Diagram with the Cube-Shaped 3-Wire Inductive Proximity Sensor

This ignition system operates with full 12 volts. This is a thoroughly tested, researched and proven reliable ignition system invented by Brian Miller for ordinary lawn & garden engines and competition pulling engines. With most tractors, the ignition conversion can be made with the engine in the tractor. The only modifications that need to be done is the flywheel shroud needs to be loosened to access and replace the Trigger Module, and two holes will need to be drilled and tapped with the 2 supplied screws in the kit. To install this replacement ignition system; the ignition coil mounts in place of the Breakerless Ignition coil; the proximity cube sensor/bracket mounts in place of the Breakerless Ignition Trigger Module, which is located at the 10:30 position on the bearing plate; and two 9/64" holes will need to be drilled and tapped (with the two self-threading screws are supplied with the kit) on the backside of the bearing plate, on the left side when facing the flywheel, to mount the GM HEI ignition control module.

List of Parts in Kit Includes:

New high output cube-shaped 3-wire inductive proximity sensor w/mounting adapter and two Allen head mounting screws w/lock washers.
New high quality GM 4-pin HEI electronic ignition control module with two small flat washers (goes between the module and mounting surface) and two 8-32 UNC x 5/16" hex head self-threading screws (not self-tapping).
One 3/16" and three 1/4" slip-on crimp wire connectors (for module), three 3/16" ring crimp wire connectors (for ignition coil and ground W terminal on module), and two nylon wire clamps (loops) to secure wires in place.
New 12 volt canister ignition coil w/mounting bracket/clamp.
New 10" or 13" length metal core spark plug wire. IMPORTANT - Due to length of spark plug wire, please indicate if original coil is mounted next to carburetor (10" length) or above starter motor (13" length).
New Autolite 216 or Champion 844 (H10C) spark plug. Set spark plug gap at .035" with this system.

Installation Instructions:

Fasten the cube-shape proximity sensor on the two bosses that's on the bearing plate with the supplied Allen head screws and split lock washers. If there are no threaded holes in the bosses, drill with a 5/32" bit, and cut 10-24 UNC threads in the bosses. Route the insulated wires on the sensor through the hole in the bearing plate.
Mounting of module requires two 9/64" drilled holes. Module can be remotely mounted on a flat surface with cool, circulating air, or to install module behind bearing plate, use a close quarters power drill or use an ordinary 3/8" power drill with a custom-made 7" length x 3/8" diameter drill bit extension with a 9/64" drilled end hole and two Allen set screws to secure the 9/64" drill bit. (As shown to the right.) If engine is equipped with a mechanical fuel pump, it will need to be removed for installation of the module, then reinstalled afterwards.
Use the two supplied 8-32 UNC x 5/16" hex head self-threading screws to fasten HEI module with two flat washers between the module and mounting surface to create an air gap between the module and backside of bearing plate or mounting plate with cool, circulating air to dissipate the operating heat. Mounting holes in module body must be grounded to engine/chassis ground (battery negative (–) post).

Wiring Diagram and Wiring Connection Instructions:

Connect the BLACK wire on the sensor to the [G] terminal on the module.
Connect the BLUE wire on the sensor to the [W] terminal on the module and to engine/chassis ground (battery negative (–) post). NOTE: The [W] terminal on the module does not need to be connected to anything, but the blue wire on the proximity sensor must be grounded.
Connect the ignition coil negative (–) terminal to the [C] terminal on the module. For competition pulling - if the grounding-type kill switch is used, connect the ungrounded wire from the kill switch to this terminal. Or for a generator engine, connect this terminal with a semiconductor rectifier diode to "excite" or temporarily energize the field windings in the generator.
Connect the BROWN wire on the sensor to the [B] terminal on the module, and to the ignition coil positive (+) terminal and to the ignition switch, which connects to the battery positive (+) post.
The cube-shape proximity sensor has a built-in LED (Light Emitting Diode). If the proximity sensor is wired correctly, the LED will illuminate when in close proximity to the detectable target.

For customer service assistance, and FREE honest and accurate technical support, please contact: A-1 Miller's Performance Enterprises | 12091 N. Route B | Hallsville, MO (Missouri) 65255 USA | Phone: 1-573-881-7229 (cell; call or text). Call any day, Monday-Friday, 9am to 5pm, Central time zone. If no answer, please try again later. (When speaking with Brian on the phone, please be patient and understanding because I stutter.) E-mail: pullingtractor@aol.com.