Hei Ignition Module Wiring Diagram, Find out how to properly wire the module to ensure optimal performance and functionality. Use a relay using battery power to feed the pink ignition wire and tap the power feed to the HEI to turn on the relay. Hii,What type of distributor would you use if you remove lean burn system and put a hei 4 pin gm module for ignition ?. May 23, 2026 · Jim Coyle don’t connect to the HEI power. They also have a gray tach output wire to trigger a tach or even an aftermarket EFI system, such as the 󰞋 󰞋 99K Members Jeep CJ7 Shane Parker󰞋3h󰞋󱟠 󳄫 Installing a new HEI distributor in my 78 with a 304 motor …My question is do I need to change my plug gap from the original setup. Numbers on bottom of relay next to terminals. I do now I have to switch cam gears . Ignite your engine's performance with MSD. Learn step-by-step instructions and diagrams to help you install and troubleshoot your HEI ignition system. Connect the ignition coil negative (–) terminal to the [C] terminal on the module. mx, lakiaa, ay1aewrts, bcozc, 9s, sl, bktn, 1oibl, qww3hx, oywv3nit,