The Kenworth Power Distribution Box service manual, publication KM815020, is the electrical-section reference for adding and testing circuits on W900, T600, T800 and C500 chassis built before 12/03/01. This six-page factory document explains how the field-serviceable distribution system is organised, how current flows through it, and how it keeps every circuit properly protected as options are added.
Which chassis this manual covers — Kenworth Power Distribution
The procedures apply to trucks built between 3/01/82 and 12/03/01. The Kenworth Power Distribution Box electrical system was first introduced in March 1982 and lets a workshop add electrical options in the field while keeping the whole system properly fused. For chassis built after 12/01, the manual directs the reader to the companion document KM815055 instead, so confirming the build date is the first step before using this manual.
Adding electrical circuits — Kenworth Power Distribution
The manual walks through how current travels through the box, starting at the right-side terminal, so that a new accessory can be tied in without overloading an existing circuit. It stresses maintaining protection of the entire electrical system whenever options are added, and it explains how the box is laid out so a technician can find the correct feed and ground points instead of splicing into an unknown wire.
Testing and troubleshooting
Because it defines the base electrical architecture, the Kenworth Power Distribution Box manual is the correct first reference before wiring any new circuit or chasing a dead accessory on an older chassis. A sound approach is to:
- Understand the power path through the box before back-probing
- Confirm fuse and circuit-breaker protection for any added load
- Reference the box layout when isolating a dead accessory
- Verify grounds as carefully as feeds
Document details manual information
The document is issued by Kenworth Customer Service under number KM815020, dated 03/05/03, in the Electrical section of the service literature. Following it keeps a field-added circuit both reliable and correctly protected, which matters most on the older chassis this manual serves. Brand and dealer information is available at the Kenworth website. Related electrical prints are in the DiagTechPro manuals library.
Applies to these truck models
This is the manufacturer document shared across 4 model families. It applies to:
- Kenworth C5
- Kenworth T6
- Kenworth T8
- Kenworth W9
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