Controlling hydrofan with ECU

May 18, 2007
701
0
16
50
Aarhus
I'd like to do away with the hydrofan control box and I'd like to be able to add more functionality to the fan.

So does anyone know how the pressure solenoid is controlled? I assume it is powered by some PWM signal. But how? Voltage (12 V?), polarity (which pin is what?) , duty cycles (range without damage?) ect.