Harness Wire Identification
Caterpillar identifies all wires with 11 solid colors. The circuit number is stamped on the wire at a 25 mm (1 inch) spacing. Table 1 lists the wire colors and the color codes.
Color Codes for the Harness Wire     | |||
Color Code     | Color     | Color Code     | Color     |
BK     | Black     | BU     | Blue     |
BR     | Brown     | PU     | Purple     |
RD     | Red     | GY     | Gray     |
OR     | Orange     | WH     | White     |
YL     | Yellow     | PK     | Pink     |
GN     | Green     |     |     |
For example, a wire identification of X925-PK on the schematic would signify a pink wire with the circuit number X925. X925-PK identifies the power supply for the No. 1 injector.
Note: Always replace a harness wire with the same gauge of wire and with the same color code.
Note: In the following diagrams, "Pxxx" signifies a plug and "Jxxx" signifies a jack.
Schematic Diagrams
Illustration 1 | g02362076 |
Schematic diagram of the engine connections to the J2 connector on the ECM |
Illustration 2 | g02362277 |
Schematic diagram of the NRS equipment |
Illustration 3 | g02431956 |
Schematic diagram of the Clean Emissions Module (CEM) Sheet 1 of 2 |
Illustration 4 | g02362216 |
Schematic diagram of the Clean Emissions Module (CEM) Sheet 2 of 2 |
Illustration 5 | g03381123 |
Schematic Diagram for the Application |