TUBE AS 3324527 - 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     GN     Green    
BR     Brown     BU     Blue    
RD     Red     PU     Purple    
OR     Orange     GY     Gray    
YL     Yellow     WH     White    
        PK     Pink    For example, a wire identification of A701-GY on the schematic would signify a gray wire with the circuit number A701. A701-GY identifies the power circuit for the No. 1 Injector solenoid.Another wire identification on the schematic is the size of the wire. The size of the wire will follow the wire color. Wire size or gauge is referred to as AWG. AWG is a description of the diameter of the wire.For example, a code of 150-OR-14 on the schematic would indicate that the orange wire in circuit 150 is a 14 AWG wire.If the gauge of the wire is not listed, the wire is 16 AWG.