Simple 4 pin hei wiring

The 7 Pin HEI Module. With a GM HEI 7-pin (and 8-pin modules), the ignition module wires you need to know about are: tach signal is a purple wire with a white trace [pin R] goes to Ampseal OPTOIN+

pin #30 (ground the Ampseal OPTOIN- pin #31 at the distributor) ; advance control signal is a white wire [pin E] goes to Ampseal pin #12; override (cranking) signal is a tan wire with a black trace General Motors HEI Ignition Control with MegaSquirt-II. There were a number of different kinds of General Motors HEI modules: 4 pin module - electronic ignition, but doesn't do computer timing control, top left; 7 pin module (large) - electronic module that does timing control, used with coil-in-cap distributors, top right; 7 pin module (small) - electronic module that does timing control A. A 4 pin HEI module tach output is off the negative terminal of the coil, so the voltage is too high for the input on

the MicroSquirt. You can, however, swap to a 7 or 8 pin HEI, and use the "R" pin for a tach signal for the MicroSquirt. Here I will outline building your own fuse block and attach relay sockets. This is a general guide that will work for most any wiring harness. Notes: For the pressure control (PC) solenoid: You need a minimum 4.7 Ohm (or higher resistance - up to ~10 Ohms), 10 Watt (or more) resistor (such as Digi-Key 4.7CWBK-ND, $1.67) on the pressure control solenoid wire from the trans connector pin D to the GPIO board's pin 33. This resistor dissipates up to 4 Watts of power at low line

pressures (maximum PWM percentages). MegaManual Index-- External Wiring Schematic-- External Wiring with a V3.0 Main Board-- Some Wiring Considerations General Guidelines for Automotive Wiring-- Wire Sizes The Relay Board-- Making a “Pigtail” to Connect to MegaSquirt--MAP Sensor-- Oxygen Sensors-- Temperature Sensors EasyTherm-- Throttle Position Sensor--

Fast Idle Solenoid-- Ignition Triggering-- Sensor Troubleshooting MOPAR Micro-Processor IGNITION SYSTEMS. Digital Micro Processor Circuitry, EPROM Processor with Built in DEAD STOP Algorithm REV Limiter all designed and engineered IN HOUSE and every component is Proudly Made In USA!. Eliminates Ballast Resistor, 44KV Output on demand, Plug and Play, one simple wiring modification (Eliminate Ballast Resistor, Kit Included), stock mounting, … MegaShift™ 4L80E Wiring. This page provides information on how the 4L80E automatic transmission from General Motors operates with the MegaShift™ controller, as well as the TunerStudioMS settings needed to configure the controller. The 4L80E is a 4-speed (with overdrive), electronically controlled transmission, with ratios: The V3.0 PCB has 4 spare connectors (SPR1 to 4) these

can be used for various inputs and outputs for the following circuits as they are conveniently available on the 37pin DB connector: MicroSquirt3® controllers have: Tiny footprint.The V3 MicroSquirt case is just is 4.71" (120mm) long by 3.13" (79.5mm) wide by 1.67" (42.4mm) to the top of the

Ampseal connector. The V3 MicroSquirt® controller uses the sealed 35-pin AMPSEAL connector and a sealable plastic case.

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