: A comprehensive document covering 18 key systems, including power distribution, HVAC, exterior lighting, and engine controls. 2007 M2 Electrical Body Builder Reference Guide
: Best for understanding harness layouts (Forward Chassis, Main Cab, and Powertrain) and pinout details for the BHM and CHM. Business Class M2 Wiring Diagrams (2011-2018) diagrama electrico freightliner m2 pdf