ez wiring 4 pin ecu

What Mopar does with the ignition switch for ign1 / ign2 and coil resistor bypass is fairly unique. Both GM and Ferd did this with the "I" terminal of the starter relay/ solenoid. That terminal goes "hot" when the solenoid is pulled in and feeds the coil "hot" power for starting. Mopar did this in the ignition switch instead

Most "hotrod" and universal harnesses ignore us Mopar guys for wiring specifics