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Re: vent motor or resistor???=-
First, fix the vacuum reservoir. That way all the air comes out the vents you select instead of defaulting to the defrost position.
I'd be testing the voltage on the power wire to the blower motor. Given a current probe and an oscilloscope, I'd be testing the amperage draw of the blower motor, which with some observation of the 'scope and a hint of mathematics will also get you the motor RPM.
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For the good of the Free World, DEMAND COMPENSATION FROM CHINA for their release of the Virus Originating in the Wuhan Laboratory, released (intentionally or negligently) into the world in 2019 (VOWL-19). Ten trillion to start with, increasing as needed from there, PLUS compensation for the sickened, and "wrongful death" settlements for the families of those who didn't survive. END trade with Communist China.
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