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

Engine Wiring Information

C4.4 and C6.6 Engines for Caterpillar Built Machines [KENR5389]

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ELECTRICAL AND STARTING SYSTEM

WIRING GP

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

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.

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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.