Electronic Control Unit

There are 8 wires leading from the control unit, 2 to one connector, 2 to another and 4 to another. The White wire and Red wire leading from one 2 wire connector are for ignition feed circuits (White wire for cranking and Red wire for after engine is running). The control unit uses the Green wire to turn power to the ignition coil off and on. The Orange and Violet wires are used to transmit signals from the distributor's pick-up coil (sensor) to control unit. The Black wire supplies the distributor ground circuit. The Yellow wire from the MCU to the control unit transmits signals from the Micro Computer Unit (MCU) to the control unit for ignition retard.