First, the common faults and causes of automotive wiring harnesses, common automotive wiring harness failures are: poor contact between plug-ins, short circuits, open circuits, lap joints, etc. between wires.

The main causes of automotive wiring harness failure are as follows:

1. Natural factors The service life of the wiring harness is ultra-long, the wire is aging, the insulation layer is damaged, and the mechanical strength is not up to standard, resulting in short circuits, broken circuits and towers between circuits, and burning the wiring harness. Many cases of electrical equipment not working normally are caused by poor contact, and many causes are oxidation, deformation, etc. at the end of the harness.
2. Damage to the wiring harness caused by the failure of the equipment The failure of electrical equipment can easily cause the wiring harness to be damaged, and the common faults are short circuit, open circuit and so on.
3. Subjective human reasons When assembling or overhauling auto parts, the metal object will crush the wiring harness and rupture the wiring harness insulation layer; improper position of the wiring harness; the wrong position of the leads of the electrical equipment; The positive and negative leads of the battery are reversed; When overhauling the circuit with problems, if the wires are connected indiscriminately or cut indiscriminately, it may affect the electrical equipment and even burn the wiring harness.

Second, how to maintain and maintain when using car wiring harnesses Generally, car riders who are more skilled in car maintenance may know that car wiring harnesses need to be regularly maintained with harness protectors. Because the harness protector is sprayed on the harness, it is equivalent to adding a protective layer to the harness, which has the effect of moisture-proof and anti-oxidation. Moreover, the protective agent also has insulation, high voltage resistance and other properties, and regular use can also prevent wire harness cracking and aging.

However, when using wire harness protectants, there are also some things to pay attention to. For example, it cannot be used directly when the harness is not cleaned, so as not to prevent the protective agent from playing a role; The dosage of each spray should be appropriate, too little to form a protective film, too much is easy to affect the performance of the harness, but also a waste of resources. In short, the maintenance of the car wiring harness is not only necessary, but also needs to be persisted in for a long time, can not fish for three days and dry the net for two days, can not be too frequent, otherwise it is easy to lead to improper maintenance, and then cause a variety of automotive electrical equipment failure.