Common diagnostic methods for automotive circuits and electrical faults
Release time:
2023-12-29
There are many ways to diagnose automotive circuits and electrical faults. The following car maintenance will give you a summary. As for when to use which diagnosis method, you will know more after reading it, and those who do not understand will consider it carefully.
There are many ways to diagnose automotive circuits and electrical faults. The following car maintenance will give you a summary. As for when to use which diagnosis method, you will know more after reading it, and those who do not understand will consider it carefully.
1. Intuitive diagnosis method Intuitive diagnosis method is the step of repairing automobile electrical appliances, and it is also a simple step. Inspection and troubleshooting can only rely on the direct feelings and experience of the inspector. When a certain part of the car's electrical system fails, abnormal phenomena such as smoke, sparks, abnormal noise, burnt smell and high temperature will occur. Through the sensory organs of the human body, the appearance of automobile electrical appliances can be checked by seeing, smelling, asking, cutting, and smelling to determine the location of the fault. For maintenance personnel with certain experience, some more complex faults can be found, which greatly improves the speed of maintenance. For example, when the car is driving, when the turn signal switch is turned on, it is suddenly found that neither the turn signal light nor the turn indicator light is on. Touch it with your hand and feel that the flash relay is very hot, indicating that the flash relay has burned out. When the electrical components are working properly, they should have a suitable operating temperature. If the temperature is too high or too low, it means that there is a fault. For example, when the starter is running weakly, if the battery pole is in poor contact with the wire, it will feel hot when touched.
2. The diagnostic method of grounding fire test It is a method to judge the fault based on the intensity of the spark generated at the end of one wire of the electrical equipment to test the metal parts of the car. This method is relatively simple and is a simple and convenient method often used by most automotive electronic and electrical maintenance workers. Systems using electronic equipment usually do not allow this method, and must be carried out according to certain methods with the help of some instruments and tools. Otherwise, the over-current generated by the "fire test" will cause unexpected damage to certain circuits and components.
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