Webto the interior wiring through an opening in the front wall. The bhm has four harness connections on the engine side of the front wall and three harness connections to the. Webwiring diagram for the freightliner m2 bulkhead module. When it comes to the wiring diagram for the freightliner m2 bulkhead module, there are several key components that. Not all of the information contained in this manual applies to every vehicle. Weba freightliner m2 wiring diagram is a detailed visual representation of the electrical system and wiring connections in a freightliner m2 truck. It provides an organized and.