1, introduction: harness is mainly composed of wires, terminals, connectors and a sheath consisting of vehicle electrical components, is the bridge and link, the vehicle electrical appliances to reach normal, stable work, in addition to the electrical components of their own quality, and harness in a vehicle is closely related to the laying of.

2, automotive wiring harness classification: automotive wiring harness according to their function can be divided into: chassis harness, harness air-conditioning, heater wiring, ABS line beam generator, start the machine, wire harness, battery positive, negative line, special configuration and drinking water machine line, refrigerator line, door pump line.

In 3, the wiring harness principle and norm of points: at present, according to the field produced by the vehicle type, features can be seen: front engine wiring harness shop located in the frame groove inside the beam, according to the electric device specific position determining distribution of rear engine wiring harness, a general principle is : on the right side of the laying of the heater wire, other harness many paved on the left side.

Matters needing attention:

1, according to the model using the corresponding chassis harness.

2, check the process card configuration, determine the specific configuration.

3, all wiring harnesses and any metal interference are protected. Mainly take the following measures: frame hole with groove ring, lead frame, the lower wing surface and a semicircle hole with keel. Protection of the eye is to prevent the vibration of the vehicles, harness and the frame or other pieces of metal wire breakage caused by friction rubber, due to ground fault or fire.

4, in addition to rear engine series, wire harnesses are generally laid on the frame groove shaped beam.

5, wiring harness connector must be inserted to secure, prevent loosening or separated from the connector, resulting in poor contact.

6, harness cannot and high-temperature parts are fixed together, preventing scald. If there is difficulty in arrangement, need to be protected. Commonly used paper or cotton insulation.

7, harness and engine or other moving parts in contact, prevent the harness was involved in the accident.

In 8, the wire harness from stationary state to the engine and other moving parts during the transition, the wire remains about 20mm movement length, preventing the engine and other sports sports will harness snapped.

9, harness and brake lines, fuel lines strung together, to prevent short circuit spark wire harness made into tracheal leak and fuel leaks, causing the brake failure and fire. General provisions: tubing beneath, the trachea comes, wiring harness on house.

10, harness strapping can not be loose. Requirements : two adjacent line deduction distance 300mm, the suspension should be appropriately called line deduction.

11, harness strapping can not be tight, elastic moderate.

12, harness strapping cannot" die", should be slightly into" a few" word shape. Because were too straight, when the vehicle vibration terminal loose easily cause bad contact, followed in the repair when pulling, plug will inconvenience. A harness strapping principles: security is more important than appearance.

13, a cathode line served on the frame, the contact surface on the paint should be scraped off to expose the metal, bright, the contact surface and the contact surface between the frame into the drama gaskets.