Electronic wiring harness common problems and judgment method?

Electronic wiring harnesses will always fail for a variety of reasons during operation. Common malfunctions include poor plug contact, short circuits between wires, breaks, and hitches.

So, what are the reasons for electronic wire harness failure?1, natural aging or damage The wire harness is used for more than the use of time, the insulation layer of the wire harness began to slowly crack, the mechanical strength began to decline, and over time it is easy to lead to short circuits between the wires and wires, breaks, hitching and other malfunctions. 2, harness terminal oxidation When the harness terminal is completely oxidized, or has been deformed, will also cause poor contact or short circuit, so that the harness failure. 3, electrical equipment failure There is also a situation because of electrical equipment overload, short circuit, which leads to wire harness failure. 4, man-made reasons The last cause of failure is the cause of improper human operation, such as wiring harness installation location is unreasonable, the wiring harness and electrical equipment wiring errors, maintenance damage to the wiring harness components and so on. Electronic wire harness failure detection and identification: iron: electronic wire harness burned out of the law is the power system in the circuit, which point of the iron, the electronic wire harness burned to where it burned out with no defective parts of the intersection, you can be the wire iron; if the electronic wire harness burned out to the wiring parts of an electrical device, it is marked as a failure of the electrical equipment. Short-circuit: electronic wire harness by external kneading, impact, resulting in electronic wire harness wire insulation layer damage, resulting in short-circuit between the wires, so that some electrical equipment out of control, the safety wire melted. Judgment, you can open the electrical equipment and control switch at both ends of the electronic wiring harness plug connector, with a meter or test lamp to detect the short circuit of the line. Disconnection: wire disconnection fault, in addition to the obvious cracking phenomenon, rare faults occur between the wire and wire terminals. Some wires are disconnected, the outer insulation layer and wire terminals are not missing, but the wire within the core wire and wire terminals have been disconnected. Discriminate, can be suspected of breaking the lead high temperature resistant line and wire terminals to do tensile strength test, tensile strength test process, such as wire insulation layer gradually thin, can be recognized that the wire has been disconnected. Poor line contact, the fault occurs in the plug. Poor contact with the plug: when the fault occurs, it will cause the electrical equipment can not operate normally. Judgment, turn on the power of the electrical equipment, touch or pull the electrical equipment related to the plug, when touching a plug, the electrical equipment, the operation of the sudden normal, suddenly abnormal, indicating that the plug has a fault.

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