Do you know how to check the wiring harness? If you don't already know, here's how to check your car wiring harness. Tool inspection and lamp test are more suitable for checking wire break fault. The use of temporary test lamp method should pay attention to the power of the test lamp is not too large, in the test of the control output terminal of the electronic controller is output and whether there is enough output should be especially careful, prevent the overloading of the controller damage. It is better to use diode test lamp.
When a part of the car electrical system fails, there will be smoke, spark, abnormal sound, coke smell, high temperature and other abnormal phenomena. Through the human body's sensory organs of hearing, feeling, smell, look on the car wiring harness and electrical inspection, and then judge the fault location, so as to greatly improve the maintenance speed. For example, when the car line failure, often appear smoke, sparks, abnormal sound, coke smell, high temperature and other abnormal phenomena. Through visual inspection, you can quickly determine the location and nature of the fault.

CJT SMT wire connection inspection Method The connection method is to short-circuit a suspected faulty line with a wire and observe the change of instrument pointer or the working condition of electrical equipment to determine whether there is a fault of break or bad contact in the circuit. Jumper refers to the operation of connecting two points of the circuit with a wire. The potential difference between the two points of the circuit is zero, not a short circuit. Instrumentation inspection method the use of integrated fault diagnosis instrument, multimeter, unwave, current clamp and other instruments to diagnose the fault of an automobile circuit. For electronic control system vehicles, the general use of comprehensive fault diagnosis instrument to find the fault code, to diagnose the range of vehicle fault; Then use a multimeter, current clamp or wave divider to check the voltage, resistance, current or waveform of the circuit, and diagnose the fault point of the harness conductor.