Common faults of automobile wiring harness
Common car wiring harness failures and causes
Common car line faults are: Poor contact of connectors and short circuit, open circuit, overlap between wires, etc. The main reasons that cause car line failure are as follows:
(1) Natural factors
The service life of the wiring harness is too long, the wires are aging, the insulation layer is damaged, and the mechanical strength is not up to standard, resulting in short circuits, open circuits and towers between the circuits, and burn out the wiring harness. The failure of electrical equipment to work in many cases is caused by poor contact, and many of the causes are oxidation and deformation of the wire harness end.
(2) Harness damage caused by equipment failure
Failure of electrical equipment can easily cause damage to the wiring harness. Common faults include short circuit, open circuit and so on.
(3) Subjective artificial reasons
When assembling or overhauling auto parts, metal objects crush the wire harness and break the wire harness insulation;
Improper wiring harness position;
The lead position of the electrical equipment is connected incorrectly; the positive and negative leads of the battery are connected reversely;
When overhauling the circuit with problems, if the wires are randomly connected or cut, it may affect the electrical equipment and even burn the wiring harness.
When assembling or overhauling auto parts, metal objects crush the wire harness and break the wire harness insulation;
Improper wiring harness position;
The lead position of the electrical equipment is connected incorrectly; the positive and negative leads of the battery are connected reversely;
When overhauling the circuit with problems, if the wires are randomly connected or cut, it may affect the electrical equipment and even burn the wiring harness.
2. How to judge the fault of the wiring harness
Poor contact is the most common problem in line faults. In this case, it is necessary to use a multimeter to conduct a step-by-step investigation to narrow the scope of the fault. Generally speaking, you need to pay special attention to the position of the plug-in docking. Poor contact caused by the back-out of the plug-in terminal is likely to be missed.
Electronic system circuit short circuit, electronic system fuse blown, etc. are common faults in automobiles. Finding the specific short-circuit location is the key to solving the fault. To check the circuit devices of the overall electronic system, this work is more cumbersome, heavy workload, and careful.
Poor contact is the most common problem in line faults. In this case, it is necessary to use a multimeter to conduct a step-by-step investigation to narrow the scope of the fault. Generally speaking, you need to pay special attention to the position of the plug-in docking. Poor contact caused by the back-out of the plug-in terminal is likely to be missed.
Electronic system circuit short circuit, electronic system fuse blown, etc. are common faults in automobiles. Finding the specific short-circuit location is the key to solving the fault. To check the circuit devices of the overall electronic system, this work is more cumbersome, heavy workload, and careful.
After we discover the problem, we must take timely measures to solve the problem to prevent the problem from recurring. First of all, it is necessary to make a comprehensive and accurate judgment on the place where the wiring harness may appear. Under normal circumstances, automotive electronic systems support more functions, and the wiring harness of the system is more complicated. A whole car wiring harness requires a lot of lines and related components. It is not easy to find a short-circuit point in such a huge and complex system. It is not only necessary to disassemble the instrument and interior trim. Sometimes even a section of the wire harness has to be stripped for inspection.
3. Solving the problem is not the goal, the important thing is to prevent the problem from recurring
I have always emphasized that after troubleshooting, it does not mean that the problem is solved. The most important thing is to prevent the problem from recurring. Some colleagues will encounter the same problem many times, which will consume a lot of time and energy. Therefore, afterwards, you must think about how to prevent it from happening and implement it.
