Automotive wiring harnesses are used very frequently in our industrial field. Such a product with a wide range of application scenarios usually has a high demand in the market. Therefore, manufacturers must do a good job of quality control when producing products, and at the same time To do a good job in quality inspection, what is the inspection method of automobile wiring harness?
1. Tool inspection method
The test lamp inspection method is more suitable for checking for wire breakage faults. When using the temporary lamp test method, it should be noted that the power of the test lamp should not be too large. When testing whether the control output terminal of the electronic controller has output and whether there is enough output, be especially careful to prevent the controller from being overloaded and damaged. It is best to use a diode test light.
Second, the visual inspection method
When a certain part of the automotive electrical system fails, abnormal phenomena such as smoke, sparks, abnormal noise, burnt odor, and high temperature will occur. Through the human body's sense organs to listen, touch, smell, and look, the wiring harness and electrical appliances of the car are visually inspected, and the location of the fault can be judged, thereby greatly improving the maintenance speed. For example, when the car line fails, abnormal phenomena such as smoke, sparks, abnormal noise, burnt odor, and high temperature often occur. Through visual inspection, the location of the fault and the nature of the fault can be quickly determined.
Three, wire jumper inspection method
The jump connection method is to use a wire to short-circuit the suspected faulty line, observe the change of the pointer of the instrument or the working condition of the electrical equipment, so as to judge whether there is an open circuit or poor contact fault in the circuit. Jumping refers to the operation of connecting two points of two circuits with a wire. The potential difference between the two points of the circuit connected is zero, not a short circuit.
Fourth, the instrument inspection method
A method of diagnosing faults in automobile circuits by using instruments such as comprehensive fault diagnosis instruments, multimeters, wave filters, and current clamps. For vehicles with electronic control system, a comprehensive fault diagnosis instrument is generally used to find fault codes to diagnose the fault range of the vehicle; The point of failure of the harness wires.