What is this ?
If you made a schematic of the car's original power, ignition, and start circuits it will look something like this.
A '4 Pin' ECU can be wired in like this.
The terminal at the point of the pentagon connector is power supply.
Two wires connect to the magnetic pickup in the distribributor. They provide pulse signal.
The remaining pin is the coil to earth. Just like a points distributor it's connection to earth is closed and then opened.
The missing pin is where the second power wire was on 5 Pin ECUs.
1972 Imperial & Chrysler Ignition System Service Book (Session 292)
If you made a schematic of the car's original power, ignition, and start circuits it will look something like this.
A '4 Pin' ECU can be wired in like this.
The terminal at the point of the pentagon connector is power supply.
Two wires connect to the magnetic pickup in the distribributor. They provide pulse signal.
The remaining pin is the coil to earth. Just like a points distributor it's connection to earth is closed and then opened.
The missing pin is where the second power wire was on 5 Pin ECUs.
1972 Imperial & Chrysler Ignition System Service Book (Session 292)
