How to test and judge the wiring harness

How to detect and judge the harness? 1. Detection and judgment of the burn-out fault of the wire harness In the circuit of the power supply system, where the wire harness is grounded, the wire harness will be burned. If the wire harness is burned out at the junction with the intact part, it can be considered that the wire is grounded. If the wire harness is burned out to the wiring part of an electrical equipment, it indicates that the electrical equipment is faulty. 2. Detection and judgment of short circuit, open circuit and poor contact between wires 1. The wire harness is squeezed and impacted from the outside, causing damage to the insulation layer of the wire in the wire harness, resulting in short circuit between wires. When the 2、 is judged, the wiring harness connectors at both ends of the electrical equipment and the control switch can be disassembled, and the short circuit of the circuit can be detected by an ammeter or a test lamp. In addition to the obvious fracture phenomenon, the common faults of 3、 wire open circuit mostly occur between the wire and the wire terminal. After some wires are broken, the outer insulation layer and the wire terminal are intact, but the inner core wire and the wire terminal are broken. During the judgment, a tensile test can be performed on the conductive wire and the wire terminal suspected of being broken. During the tensile test, if the insulation layer of the wire is gradually thinned, it can be confirmed that the wire has been broken. The circuit of the 4、 is in poor contact, and the fault often occurs in the connector. When a fault occurs, it will cause the electrical equipment not to work properly. And when jud, turning on that pow supply of the electrical equipment, and touching or pulling related connector of the electrical equipment, wherein when a certain connector is touched, the electrical equipment works normally or abnormally, which indicates that the connector has a fault.

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