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
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| Illustration 1 | g02362076 |
Schematic diagram of the engine connections to the J2 connector on the ECM | |
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| Illustration 2 | g02362277 |
Schematic diagram of the NRS equipment | |
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| Illustration 3 | g02362256 |
Schematic diagram of the Clean Emissions Module (CEM) Sheet 1 of 2 | |
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| Illustration 4 | g02362216 |
Schematic diagram of the Clean Emissions Module (CEM) Sheet 2 of 2 | |
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| Illustration 5 | g03888259 |
Schematic Diagram for a Typical Application | |