HOUSING 0021930 - Caterpillar

Harness Wire Identification
Caterpillar 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.Component Locations
Illustration 1 g01765714
Components for the C4.4 engine
Illustration 2 g01765717
Components for the C6.6 engine