G4 Wiring and Installation Manual
16
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Power and Ground Wiring
6.2
+14V In
Storm ECU's have one red wire that supplies power to the ECUs internal supplies.
Xtreme ECUs have two red power wires. The power wire in connector A is used to power
the ECUs internal supplies. The red +14V Aux 9/10 power wire in connector B is used to
power the Aux 9 and Aux 10 drivers. For non electronic throttle control applications both red
wires should be connected to a relay that provides power when the key is in the ‘ON’
position. BOTH +12V In wires must be connected at all times.
Although the ECU does not draw a large amount of current, the voltage applied to the ‘+14V
In’ wire must remain above 7 Volts at all times. This is especially important while the starter
motor is being cranked. A significant drop in voltage will result in the ECU undergoing a
reset that will stop the engine from running. As a result, it is important that the battery is in
good condition and suitable for the application. Also, make sure that all wiring to the battery
and associated terminals are clean and free from corrosion.
6.3
+14V Aux9/10
Note: this applies to Xtreme ECUs only.
The +14V Aux 9/10 wire provides an external power supply to the Aux 9 and Aux 10 driver
circuitry. This allows external disconnection of the supply to these drivers as a safety
measure when electronic throttle control is used. If electronic throttle control is not being
used connect this wire to the same power supply as the ECUs +14V In wire. If wiring with