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PWM Intercooler Pump


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I have an intercooler pump with built in controller that requires a PWM signal to wake up and control the speed. The pump is not designed to run at 100% duty cycle all the time, otherwise I would just join the signal and power wire together and leave the ECU out of it.

As I'm at the early stages of configuring the Thunder, I don't want to complicate the setup by introducing conditions upon which the speed will change (i.e. IAT or coolant temp) and only want the pump to start up and spin at say 75% duty cycle. I may do the conditional speed later or decide to change the duty cycle to 50% (or more), depending on my findings when the car runs.

What would be the easiest way to implement this? I.e. start up and setting the duty cycle via PWM.


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