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What are the Causes of Automobile Wiring Harness Failure?

03Mar
2020/03/03 10:26:59

Our more common automotive wiring harness failures are: poor contact of connectors, short circuits, open circuits, etc. between cables. There are many reasons for the failure of automobile wiring harnesses. Wire Harness Manufacturer will give you a detailed introduction below.


1. Natural reasons: Products have a service life. After a long period of use and catalysis of automotive wiring harnesses, the cables will age, the insulation layer will be damaged, and the mechanical strength will be reduced. Or electrical components burn out, so try to choose High Quality Wire Harness.

2. Electrical component failure: Electrical component failure may also cause a short circuit in the automotive wiring harness.

3. Human factors: When installing or overhauling a wiring harness to an automobile, the insulation layer of the wiring harness cable is damaged due to improper operation, or the wiring harness is installed in the wrong position, or the wiring is not strictly performed in accordance with the installation diagram, which may cause the automobile wiring harness. 


Automotive Wire Harness


So how to judge the wiring failure of the wiring harness?

For example, when the harness cable is subject to external impacts or squeezing, its insulation and protection layer may be damaged, which may cause short circuit, disconnection and poor contact between the harness cables. At this time, we can remove the terminals or connectors connected to electrical components or switches at both ends of the harness, and use a special instrument such as a multimeter to detect the failure of the cable.


As for the disconnection failure of the cable, in addition to the break phenomenon that can be directly judged from the appearance, it also often occurs at the connection between the terminal and the cable, and it is not easy to judge from the appearance. Cables that are suspected of being disconnected can be judged by tensile tests. For example, when the insulation layer of a wire gradually becomes thinner, it can be confirmed that the wire has been disconnected, or a special instrument such as a multimeter is used for testing.


Poor contact failures are prone to occur at connectors, which can cause electrical devices to malfunction. When judging this fault, you can turn on the power and switch of the electrical device, and slightly move the position of the connector. If the electrical device is normal for a while, then it is abnormal, it means that the connector has a contact failure, and then you need to use Dedicated instrument for testing.


Once a car's electronic circuit fails, you first need to determine the type of failure, and then remove the corresponding interior coverings such as the wiring harness, find the faulty electrical device and corresponding cables, switches, connectors, or sensors, etc., and then use Make an appearance judgment and simple preliminary judgment with the naked eye, then observe the current flow in the cable with current-sensing pliers, determine the fault point and then perform maintenance. After the maintenance is completed, the removed wiring harness and interior decoration need to be restored.


Therefore, the troubleshooting of the Automotive Wire Harness is a complicated and heavy workload. A little carelessness will cause artificial damage to the automotive wiring harness, which requires careful operation by professionals.

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