PWM cooling fan(s) control using ECM

[andrewb70]

Originally Posted by PTAddict

I have an LT4 and the GMPP controller kit, and a late model CTS-V cooling fan, but we're a month or two from finishing wiring and getting things running. I am hoping that I can reprogram the e92 with HPTuners to do PWM control as it does in a CTS-V - we'll see. Why GM would block PWM control in the crate motor ECUs is beyond me ...

Thanks for chiming in! Please keep this thread updated. I know from another LT4 build that the stock GMPP fan configuration is discrete fan control, with a Hi and Low fan setting. PWM would be way better, especially if you're using the new CTSV 800watt fan.

Have you found a source for the Yazaki connector and terminals for the fan?

Andrew