Power Distribution Modules

p3 dm 03.01.004

Powertrain PDM


The powertrain PDM contains fuses and relays that provide battery and ignition power to the engine, aftertreatment device, transmission, and other powertrain-related circuits. It is mounted in the engine compartment, above the driver-side inner fender.


Auxiliary PDM


The optional auxiliary PDM is used when additional circuit protection is needed for optional features. For example, if a beacon light is added to the Cascadia, it may require an auxiliary PDM. The auxiliary PDM may contain fuses and relays for these devices. It is mounted in the cab, behind the doghouse cover.


Trailer PDM


The optional trailer PDM, mounted on the frame rail, is used to supply trailer power to the chassis-mounted trailer receptacles. The SAM chassis supplies control signals to the relays in the trailer PDM.


SAM Cab


The SAM cab is located behind the glove box inside the vehicle cab. See Fig. . The SAM cab contains fuses and relays in addition to solid state circuit protection devices that will trip when a circuit is overloaded.

Refer to Chapter 25 for fuse and relay locations.

Fig. 1, SAM Cab Location


SAM Chassis


The SAM Chassis is located in the engine compartment on the driver-side frontwall. See Fig. . The SAM chassis contains fuses and relays in addition to solid state circuit protection devices that will trip when a circuit is overloaded.

  1. Powertrain PDM (PT-PDM)

  2. Inline Fuse, Auxiliary PDM

  3. SAM Chassis

  4. Powernet Distribution Box (PNDB)

Fig. 2, Engine Compartment Power Distribution Components

Refer to Chapter 25 for fuse and relay locations.

Note:
Parent topic: Electrical Power Distribution
Document Number: 0000111665
Manual Publication Date: 2025-02-11
Topic Publication Date: 2024-05-06