Description And Operation: Description
WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
The blower motor power module is a linear regulator. The Heating, Ventilation, and Air Conditioning (HVAC) sends a Pulse Width Modulated (PWM) signal to control the blower motor speed. The regulator sends its operating status to the HVAC module.