Paccar Kenworth T680 2019 Manual page 152

Section 10
Electrical
ELECTRICAL WIRING CIRCUIT CODES
Kenworth will continue to use the wiring scheme that was employed on legacy trucks. The wire system uses 10 different
colors and only one striped wire color. Each wire has a minimum of seven characters, with the first three characters as
the wire color. The remaining four characters are related to the wire services. The colors determine the circuits function as
follows:
Table 10-1. Electrical Wire Circuit Code Table
Insulation Color Color Code
Red w/white stripe R/WXXXX
Red REDXXXX
Orange ORNXXXX
Yellow YELXXXX
White WHTXXXX
Black BLKXXXX
Gray GRAXXXX
Brown BRNXXXX
Violet VIOXXXX
Light Blue BLUXXXX
Light Green GRNXXXX
MULTIPLEX SYSTEM
The VECU electrical architecture uses a multiplexing system. Multiplexing can be defined as the process of sending
multiple digital signals on the same shared medium at the same time. These signals are introduced into the multiplexing
system through data connection points which are defined by J1939 backbone.
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PACCAR Electrical Circuit Code
Electrical Function
Direct battery power
Protected battery power
Ignition, Accessory,
Low Voltage Disconnect,
StartPower
Activated Power
Ground
Load Return
Control
Indicator Illumination
Backlit Illumination
Reference Voltage or +5VDC or Sensor Power
Sensor Signal
Sensor common or Sensor Ground
10-2