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Wiring Installation and connections
Photo showing wiring connections to a Single board CPi2 ecu:
Dual board CPi2:
Like Single board details above, but times two.
Power switching +12 volt wires to Cpi2, Purple and Red wires, Breakers and Switches:
Single board CPi2: One Double pole switch and two breakers are required. 2-5A for the purple wire, 10-15A for the
Red High current wire.
Dual board CPi2: Two Double pole switches and four breakers are required. 2 x 2-5A for purple wires, 2 x 10-15A
for the Red High current wires.
It is important to switch both purple and red wire for proper operation and to also keep the backup battery
from slowly draining current when the system if shut off. Also allows proper power-off operation.
Purple wire current draw is less that 200mA.
The Red 18ga wire on the 12pin coil harness plug. This is the high current source for coil pack power +12volts. With
SDS supplied coilpacks, average current draw is less than 6 amps below 5000 rpms. We do need the 10 to 15 amp
rating for a safety buffer and also because current spikes between 4 and 8 amps for a few milliseconds with each
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