1. Wiring harnesses processing composition: the wiring harnesses processing diagram on the automobile is actually composed of many wiring harnesses, mainly including main wiring harnesses and wiring harnesses. Therefore, the composition of the wiring harness must be clearly marked on the diagram, because each harness will have several different branches, and each branch should be marked with the number of wires, as well as the color and stripes of the wires.

2. Sign and code of wiring: because the number of electrical appliances on the car is relatively large and complex, in order to correctly connect, each different connection point must clearly mark the sign and code of connection, mainly for the convenience of connection.

3. Length of wire harness processing: in fact, the length of wire harness processing also includes the total length of the whole wire harness, the length of each branch and the length of the flying interval between two wire ends.

4. Plug in the wire processing: because there are many different article, wiring harness is the wiring harnesses and wiring harness, wiring harness and branch, branch and electrical plug device is needed to connected, so be sure to mark on each different splicing device several wires, and each conductor in the splicing device which position, the main is the shape of the plug device is what kind of, pay special attention to the adjacent a few splice, is easy to confusion.