Electrical System
The Business Class® M2 features a new type of electrical system, different from any previous vehicle. Multiple electrical signals are carried along a simplified set of wires, reducing the size of wiring bundles. There are significantly fewer wires overall, meaning less chance of damage, shorts and other problems.
Warning: Do not attempt to modify, add, splice, or remove electrical wiring on this vehicle without authorization from Freightliner Engineering. Doing so could damage the electrical system and result in a fire that could cause serious personal injury or property damage.
There are two new electrical modules, a main module located near the frontwall (bulkhead module) and a secondary module located between the frame rails (chassis module).
This new wiring system features intelligent controls that blink to show switch activity and error conditions. These controls cannot be distinguished by their appearance, only by their function.
For more information about these controls, see under the headings "Axle Switches" and "Suspension Dump Switch."