Diagram - Freightliner M2 Blower Motor Wiring

This wire carries the PWM signal from the HVAC controller. You should see varying voltage (approx. 1.6V on low to 6.1V on high) or a frequency change when measured with a multimeter.

The Freightliner Business Class M2 blower motor circuit primarily consists of the Power Distribution Module (PDM) Bulkhead Module (BHM) HVAC control head blower motor assembly Freightliner M2 Blower Motor Wiring Diagram

(which includes an internal or external resistor/regulator). Blower Motor Pinout & Wire Colors This wire carries the PWM signal from the HVAC controller

The circuit involves several key connection points between the power source and the motor assembly: Power Source : Constant 12V power is typically supplied through the Power Distribution Module (PDM) Freightliner M2 Blower Motor Wiring Diagram