Wiring harness is a wiring component connecting electrical equipment in the circuit, which is composed of insulating sheaths, terminal blocks, wires and insulating wrappers.

First, for wiring harness, In order to facilitate installation and maintenance and ensure that the electrical equipment can work under the harshest conditions, the wires of different specifications and colors used in the various electrical equipment of the entire vehicle are arranged reasonably and integrated, then bundled into bundles with insulating materials, so that they are both complete and reliable.

Second, normal selection of cross-sectional area and color code about wires. a) Correct selection of cross-sectional area of wires. The electrical equipment on the car selects the cross-sectional area of the wires used according to the size of the load current. Electrical equipment that works for a long time can use 60% of the actual carrying current of the wire; electrical equipment that works for a short time can use 60%-100% of the actual carrying capacity of the wire.