The automotive wiring harness is the main network of the automotive circuit. Without the wiring harness, there would be no automotive circuit. The wiring harness refers to the contact terminal (connector) made of copper material, which is crimped with the wires and cables, and then the insulator is plastic-pressed or metal shell is added to form a component that connects the circuit. Simply put, the automotive wiring harness assembles cables, connectors, terminals and wires to transmit electricity in the car.

In the past, cars were purely mechanical and could run without electricity. However, it would be a miracle to drive a modern car without electricity.

Therefore, automotive wiring harnesses are a critical component of any car engine. Without them, the electricity cannot reach the different electrical components of the car. The ignition systems of the car, such as the starter, chassis, and alternator, all require electricity. They cannot get this electricity without the automotive wiring harness to transmit them.

But for a car, it's not enough to just have a car wiring harness. The wires and terminals must also be properly connected to the electrical components. Understanding this connection is all about understanding the different wiring harness circuits.