What are automotive wiring harness colors? What is an automotive wiring harness?

Automotive wiring harness is an important part of the automotive electrical system, which consists of a group of wires, cables, connectors and protective sleeves to transmit power and signals. The wiring harness connects various electronic devices, sensors, switches, and actuators inside the car, and also connects to lighting, sensors, and other systems outside the car. Automotive wiring harnesses serve to transmit power and signals, ensuring that the various systems of the vehicle can operate properly. The colors of automotive wiring harnesses are coded according to international standards, and different colors represent different functions and uses. The following are some common automotive harness colors and their corresponding functions: Red: generally indicates the positive power line, which is used to connect the battery and major electrical equipment, such as the engine control module (ECM), engine ignition system, etc. Black: generally indicates the negative power line, which is used to connect the negative pole of the battery and the body ground. Blue: generally indicates the power line of high beam. Green: generally indicates the wiper power cord. Yellow: generally indicates the power line of signal lamps such as side marker lamp and turn signal lamp. White: generally indicates the power cord of the headlamp. Orange: generally indicates the power line of signal lamps such as brake lamp, warning lamp and reversing lamp. Purple: generally indicates the power cord of the rear fog lamp. Pink: generally indicates the power cord of reversing assistant systems such as reversing radar and reversing image. Gray: generally indicates the sensor signal line, which is used to connect various sensors, such as oxygen sensor, speed sensor, etc. Brown: generally indicates a ground wire or a grounding wire. It should be noted that there may be slight differences between models and manufacturers, so the use of certain colors may vary in practice. In addition, there may be dozens or even hundreds of wire harnesses in a car, each with its own specific color coding. In addition to color coding, automotive harnesses are labeled or numbered on the harness itself or on the connectors to help identify and connect the correct harness. These labels often contain information about harness functions, connection locations, and related components, and are important for repair and troubleshooting. In short, the automotive wiring harness is an integral part of the automotive electrical system that transmits power and signals, and different colors of the harness represent different functions and uses.

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