Under normal circumstances, the harness manufacturers have a special harness circuit detection equipment used to check the harness failure, the harness can detect the wrong way and open the case, are generally known as the harness circuit detection platform.
1, the wire harness is burned out, this situation is usually a sudden, and the burning speed is relatively fast, in these burned lines inside, are generally no safety devices. Wire harness burn out is usually a certain law: in the power system inside the circuit, where the ground, the wire harness will burn where the burnout and intact where the junction is the place of the wire Iron; if the wiring harness is burned to the wiring location of an electrical equipment, it indicates that the electrical equipment has failed.
2, the wiring harness has been squeezed and the impact of the external, resulting in the wiring harness inside the wire insulation is damaged, resulting in a short circuit between wires, so that some of the electrical equipment out of control, the fuse is blown. If the line is poorly-connected, then most of the failure occurs in the connector inside, when the fault occurs, it will make the electrical equipment does not work properly. When judging, turn on the power of electrical equipment, pull or touch the electrical equipment related to the connector, when you encounter a certain connector, the electrical equipment suddenly can work, and suddenly can not work, and that suddenly It shows that this connector has failed.