What are the automotive wiring harness color codes? What do they represent?

Automotive wiring harness refers to the combination of a set of wires and connectors used to transmit power, signals and data in an automobile. They are coded in different colors so that the different functions of the harness can be easily distinguished and identified during manufacturing, repair, and troubleshooting. While different car manufacturers and regions may use different color codes, here are some common automotive wiring harness color codes and their common functional representations: Red: Usually indicates a power source or power line. The red harness is typically associated with the battery, engine positive, main power line, and main power switch. Yellow: usually indicates the auxiliary power supply line. Yellow harnesses are typically used for auxiliary power, backup power, battery connectors, and fuse blocks. Blue: Usually indicates the high beam circuit. The blue wiring harness is normally connected to the vehicle's high beam headlights, high beam switch, and associated circuits. Green: usually indicates a ground wire or a ground line. The green harness is typically associated with the vehicle's ground point, ground connector, and ground line. White: Usually indicates a lighting circuit. White wiring harnesses are commonly used in vehicles for headlights, rear lights, interior lighting, etc. Black: usually indicates the grounding line or ground wire. Black wire harnesses are commonly used for vehicle ground lines, ground wire connectors, and ground wires for electrical equipment. Orange: usually indicates a signal line. Orange harnesses are usually associated with signals such as turn signals, brake lights, side lights, warning lights, etc. Purple: usually indicates the rearview mirror line. The purple wiring harness is usually associated with the vehicle's rearview mirror, rear window defogger, etc. Gray: Usually indicates a control line. The gray wiring harness is typically used for the vehicle's control modules, buttons, switches, and related circuits. Pink: usually indicates an auxiliary line. Pink wire harnesses are commonly used for auxiliary circuits, auxiliary equipment, and related wiring in vehicles. Brown: usually indicates body wiring. The brown wiring harness is normally connected to the body circuits, the body control module, and associated electrical equipment. Please note that these colour codes are only a general reference and may vary between different car manufacturers and models.

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