What are the three types of wiring harness?
In the field of automotive electronics, the wiring harness (Wiring Harness) is the core component that connects all electrical equipment. Wiring harnesses are widely used in all stages of vehicle manufacturing. It connects all the systems together, from the electrical system, lighting and signal lights to the seat controls, audio system and air conditioning system. The wiring harness is also called wire organization, because its function is to organize the wires scattered in the electronic device together, so that the wiring in the car is clearer and more orderly. There are many types of wiring harnesses, the most common of which include the following three types.
1. Composite wiring harness:
Component harnesses are one of the most common types of harnesses. It refers to a wiring harness consisting of several components, each of which can be installed individually. Component wiring harnesses are generally produced or contracted by automakers themselves. This type of wiring harness is mainly used in complex electrical systems, such as automotive engine control modules (ECM).
2. Assembled wiring harness:
Prefabricated wiring harnesses are pre-fabricated by the automaker and installed on the body early in the complete vehicle build. They are pluggable, which means they can be easily removed from the body. Assembled wiring harnesses are generally used for relatively simple electrical system assemblies, mainly connecting small or relatively simple devices, such as horns, car doors and tail lights.
3. Hybrid wiring harness:
Hybrid harnesses are composed of component harnesses and fabricated harnesses. They are usually connectors between assembled wiring harnesses and component wiring harnesses, and are mainly used in the final stages of vehicle manufacturing, such as when repairing the body, where small-scale wiring harness replacement is required.

Each of the above three types of wiring harnesses has its own specific uses and advantages. Component wiring harnesses can be personalized and repaired according to specific automotive equipment, while assembled wiring harnesses can increase manufacturing efficiency and reduce manufacturing costs. Finally, the hybrid wiring harness is to combine the advantages of the two types of wiring harness to the maximum to improve the production efficiency of the whole vehicle production.


In short, there are three types of wiring harnesses: component wiring harness, fabricated wiring harness and hybrid wiring harness, each type has its own specific use, and also has certain advantages and limitations. These wiring harnesses are also an indispensable and important part of the automotive electrical system, and they ensure the coordination and cooperation between the various electrical equipment of the car.
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