Control Module HVAC: Description and Operation

A/C BLOWER MOTOR SPEED CONTROL
The A/C blower motor speed control is located under the A/C evaporator housing, to the left of the blower motor.
^ The function of the A/C blower motor speed control is to convert low power signals from the remote climate control module to a high current, variable ground feed for the blower motor.
^ A/C blower motor speed is infinitely variable and is controlled by the electronic control assembly software.
^ A delay function provides a gradual increase or decrease in A/C blower motor speed under all conditions.