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Problems to be understood before maintenance of car harness
Time:2023-11-15 Read: 898

becauseAutomotive wiring harnessThe design of car harness is more complex, which makes it more difficult to repair the car harness. Understanding the overall structure of car harness will help improve the efficiency of repair. Next, we will explain the problems to be understood before the repair of car harness.

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1. Safety issues:

Whether it is to repair or add a new car harness, take out the car's electric battery to avoid damaging the circuit due to short circuit. However, if some diagnostic tests are being carried out, the battery may be required for test lamp or multi-layer test.

In addition, before starting maintenance work, be sure to check the overall wiring and pay attention to whether there is any wiring fault. If you see any wire being gnawed or rough, please do not touch it, because the defective harness may be dangerous.


2. Understand the circuit:

At present, cars are equipped with computer-controlled circuits, which is very challenging. It is very important to understand the circuit when repairing car harnesses. There are several low-voltage signal transmission modes in modern vehicles. If they are not welded too much or spliced too long, they may add high resistance to the system, resulting in signal error and computer error calculation.


3. Matching wire gauge:

It is necessary to understand the basic knowledge of automobile harness wire gauge, and select the wire that matches the specification and corresponding signal, switch or circuit. For example, the headlamp operates on the thin line specification, while the battery operates on the thick line specification. Be sure to match the wire gauge with its function. Too thin wire will cause surge, while too thick wire will increase the electrical resistance of the current path.

In addition, it is also necessary to understand that the length and specification of the car harness determine its current carrying capacity. When the distance from the source increases, the diameter also needs to increase. As the distance increases, the voltage drop will also be higher. In order to counter this voltage drop over a long distance, it is necessary to use thicker specification wires.


4. Disconnect the car harness from the middle:

If you want to replace or repair the safety wire in the car harness, you need to remove it carefully. If you pull hard, you will damage the saddle and connector. Be careful when bending the cable and connector.


5. Avoid using solid cores:

The vehicle is constantly subject to vibration and impact, which may damage the hard solid core wire. Although the car harness can be used normally for the time being, it will cause bad problems.

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