Power Distribution Modules

108SD d 03.01.000

Important: Do not attempt to modify, add, splice, or remove electrical wiring on this vehicle. Doing so could damage the electrical system and result in a fire that could cause serious personal injury or property damage.

The main power distribution module (PDM) is located under the hood on the driver-side splash shield. See Fig.. The PDM contains the circuit breakers and fuses required to protect the vehicle cab circuits. The label on the inside of the PDM cover identifies typical set of fuses.

The powertrain PDM (PTPDM) is mounted in the engine compartment near the main PDM. See Fig.. It controls power to the engine, aftertreatment system (ATS), transmission, and other powertrain-related circuits.

  1. Bulkhead Module

  2. Powernet Distribution Box (PNDB)

  3. Main Power Distribution Module (PDM)

  4. Powertrain PDM (PTPDM)

Fig. 1, Power Distribution Module Locations

The auxiliary PDM is located on the cab back wall, behind the driver's seat. See Fig.. The auxiliary PDM may contain the auxiliary powernet distribution box, the body lighting PDM, and the trailer PDM, if so equipped.

  1. Auxiliary PNDB

  2. Trailer PDM

  3. Body Lighting PDM

Fig. 2, Auxiliary Power Distribution Module

Note:
Parent topic: Vehicle Power Distribution
Document Number: 0000110757
Manual Publication Date: 2024-09-03
Topic Publication Date: 2024-05-02