How to detect and judge the defective wire harness?

The wiring requirements of automotive wiring harnesses are also very strict: including their electrical performance, material sporadicity, temperature resistance, etc., which are higher than the general wire harness requirements, especially when it comes to safety requirements.

Detection and judgment of short circuit, open circuit and bad contact between lines:

1. The automobile wire harness processing factory claims that the wire bundle is subjected to external pressing and impact, causing damage to the wire insulation layer in the wire bundle, resulting in a short circuit between the wires.

2. Wire breakage failure, in addition to the obvious fracture phenomenon, common faults occur mostly between the wire and the wire terminal.

3. When judging, the electrical harness connector at both ends of the electrical equipment and the control switch can be disconnected, and the short circuit of the line can be detected by the electric meter or the test light.

4. After some wires are broken, the outer insulation layer and the wire terminals are intact, but the inner core wire and the wire terminal of the wire are broken.

5. When judging, the tensile test can be performed on the conductive wire and the wire terminal of the suspected open circuit. During the tensile test, if the wire insulation layer is gradually tapered, it can be confirmed that the wire has been broken.

6. The line is in poor contact, and the fault occurs mostly in the connector.

7. Automotive wire harness processing manufacturers claim that when a fault occurs, the electrical equipment will not work properly.

8. When judging, turn on the power of the electrical equipment, touch or pull the relevant connector of the electrical equipment. When a connector is touched, the operation of the electrical equipment is normal, and it is abnormal, indicating that the plug The connector is faulty.