Blower Motor Speed Control
WARNING: This page is about a different car, the 2016 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
The blower motor speed control controls the blower motor speed by converting low power signals from the HVAC control module to a high current, variable ground feed for the blower motor. A delay function is used to provide a gradual increase or decrease in blower motor speed under all conditions.
The blower motor speed control is located on the heater core and evaporator core housing near the blower motor.