Testing of the Blower Motor System Shown Is Being Discussed

Testing of the blower motor system shown is being discussed. The power module terminals for both the control and motor ground circuits is backprobed. A voltmeter is connected between the control circuit terminal and chassis ground, and the second voltmeter is connected between the motor ground terminal and chassis ground. Technician A says when the motor is turned off, both voltmeters should read 12 volts. Technician B says as the blower motor switch is rotated from LOW speed to HIGH speed, the readings on the first voltmeter should drop. Who is correct?  

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Correct Answer:

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