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International Automotive Technicians Network
Re: GM HVAC Blower Motor Technology Changes
Posted to Technical Discussion Forum on 6/23/2016

Hi Kevin. We were busy and never measured the voltage.

As Alan already mentioned, its not an AC sinusoidal sine wave, but through the effect of digitally controlling DC voltage input, the control module emulates an AC electric signal.

In simple terms it is... Login to read more.