The wiring harness color codes used in GM vehicles can be a bit confusing, as the color scheme is not always consistent. For those who need to know what each color means, it’s important to understand that these color codes are a way for manufacturers to identify wires within the vehicle’s wiring harness.
What Color Do the Wires Have?
GM vehicles use varying colors for their wires in their wiring harnesses. The first and most common is black, which is typically used in the power side of the circuit. Orange is normally used in circuits that carry alternating current, while green usually carries signals related to the start/stop feature of the vehicle or other signals to the computer. Yellow is generally used for constant power. Red and brown are used for diodes or relays, while white is used for ground.
In some cases, blue may also be found in the harness, usually signifying the high-speed serial data connection.
How Can You Identify the Color of the Wire?
To correctly identify the color of the wire in your vehicle’s wiring harness, you can consult the owner’s manual or an aftermarket manual. These will provide diagrams of the wires and what they correspond to. It’s also possible to purchase aftermarket wiring harnesses with the colors labeled for easier identification.
Why Are Color Codes Important?
GM vehicles are complex machines with many moving parts, so any repair job needs to be done properly. One of the first steps in any repair job is identifying the wires and ensuring that you know exactly what each one does. That’s why it’s important to use the correct wiring harness color codes when working on your GM vehicle.
By understanding and using the correct colors, you can ensure that your wiring project is done right the first time. This can save you time and money, as well as preventing potential damage to your vehicle.
Conclusion
Understanding the wiring harness color codes used in GM vehicles can be confusing, but it’s important to get it right. By consulting the owner’s manual and an aftermarket manual, you can make sure that you’re using the correct colors and that your wiring project is done correctly. This will save you time and money, as well as keeping your vehicle running safely and efficiently.
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