PWM cooling fan(s) control using ECM

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09-15-2016, 08:56 AM

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PWM Electrical vs. PWM EV

Does anyone know what the difference between PWM electrical and PWM EV fan control signals in a GM ECU application? Is one +12V and the other a modulated ground? This latest CTS-V fan apparently is configured as PWM EV, and I'm trying to figure out how to emulate that with a Motec ECU ...

Thanks for any help.

Scott

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