On newer M2 Plus models (2020+), the HVAC head unit doesn't even have a direct wire to the blower. The diagram will show the dash switch talking to the Body Control Module (BCM) via . The BCM then sends a LIN bus signal to the blower controller.
: Provides status information back to the controller, typically maintaining a steady voltage (around 4.9V) when the system is operating correctly. Key Electrical Components Freightliner M2 Blower Motor Wiring Diagram
On newer M2 Plus models (2020+), the HVAC head unit doesn't even have a direct wire to the blower. The diagram will show the dash switch talking to the Body Control Module (BCM) via . The BCM then sends a LIN bus signal to the blower controller.
: Provides status information back to the controller, typically maintaining a steady voltage (around 4.9V) when the system is operating correctly. Key Electrical Components
