The Dual Fire CDI has 2 red power wires and 2 black ground wires. These wires are joined together internally and should also be joined together at termination. The EMS Dual Fire CDI is essentially 2 CDI systems in one. The odd numbered channels use one discharge capacitor and the even numbered channels use another. When wiring the output channel, the CDI channel outputs must be connected to the negative side of each coil. The positive side of the coils share two common voltage output banks, one for odd channels and one for even channels.
The following file contains detail information regarding Circuit and Wiring Diagram for Dual Fire Capacitor Discharge Ignition System from EMS, herein you will learn on how to install the Dual Fire CDI System (connecting to power, mounting, ignition leads and spark plug), wire the input and output channels, overhead protection, operation modes: rotary mode, trigger edge, power select, mode select, and wiring diagram for 4, 6 and 8 cylinders, rotary 3 coil examples, and rotary 4 coil examples.