Heavy-Duty Truck Electrical Modules

This collection lists electrical and power distribution modules for heavy-duty commercial trucks from Freightliner, International, Kenworth, Peterbilt, Mack, Volvo, Western Star and other makes. Electrical modules include power distribution, relay and chassis control units that supply and protect the truck's electrical circuits.

Identifying the correct replacement

Start with the OEM or manufacturer part number on the existing unit and search for it using the search bar. Similar-looking parts can have different part numbers depending on the truck model, engine, production date and optional equipment. Confirm the part number and connector layout on your existing unit before ordering.

Condition, cores and programming

Each listing states the condition of the part and whether a core deposit or programming may be required. Use the truck-make links above to narrow the list to your truck, and contact our parts team with your truck details if you are not sure which part you need.