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Old 11-13-2019
badandy badandy is offline
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Join Date: Dec 2016
Location: delavan
Posts: 2,777

Originally Posted by Randy Dupree View Post
So the fan speed is going to be controlled in my case by the engine temp,the ddec will tell the PWM to spin the fan motor harder or to back the rpms off,depending on coolant temp.

But if the "trim" was set to higher RPMs and the cooalnt got hotter and hotter,would the PWM speed the rpms up?
Yes, exactly. Also, keep in mind, if your PWM control dies and the fan has to default to full speed it will also go straight up to the trim speed.
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