Wiring Harness Detection and Judgment

1) Detection and judgment of wire harness burnout fault

In the circuit of the power supply system, where the ground is, the wire bundle will be burned, and the junction of the burnt and the intact part can be considered to be grounded; if the wire bundle is burned 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 lines

- The wire bundle is squeezed and impacted by the outside, causing damage to the insulation layer of the wires in the wire bundle, resulting in a short circuit between the wires.

When judging, the wire harness connectors at both ends of the electrical equipment and the control switch can be disassembled, and the short circuit of the line can be detected with an electric meter or a test lamp.

- Conductor open circuit fault, except for obvious fracture phenomenon, common faults mostly occur between the wire and the wire terminal. After some wires are disconnected, the outer insulation layer and wire terminals are intact, but the inner core wire and wire terminals of the wires are disconnected. When judging, 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 gradually becomes thinner, it can be confirmed that the wire is broken.

- The circuit is in poor contact, and the fault mostly occurs in the connector. When a fault occurs, it will cause the electrical equipment to not work properly. When judging, turn on the power supply of the electrical equipment, touch or pull the relevant connector of the electrical equipment, when touching a certain connector, the electrical equipment works suddenly normal or abnormal, indicating that the connector malfunction.