C4.4 and C6.6 Engines for Caterpillar Built Machines Engine Wiring Information Caterpillar


Engine Wiring Information
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1.1. Harness Wire Identification
2.1. Schematic Diagrams

Harness Wire Identification

AVSpare identifies all wires with eleven 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.

Table 1
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 F730-OR(Orange) on the schematic would signify an orange wire with the circuit number F730. F730-OR(Orange) identifies the power supply for the oil pressure sensor.

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 1g01389750
Schematic Diagram for the C4.4 Engine Harness


Illustration 2g01390025
Schematic Diagram for the C6.6 Engine Harness


Illustration 3g01390028
Schematic Diagram for the Application

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