20 pin 174936-1 368510-1 Electrical Auto Wiring Wire Connector Cable Socket 1.8 Series

9.2.2 The commonly used elimination method and maintenance method of automobile circuit failure
(1) When the intuitive diagnosis of the car circuit fails, there will be abnormal phenomena such as smoke, spark, abnormal noise, scorched odor, and fever. These phenomena can be directly observed, so as to judge the part of the fault.
(2) The test lighting method is to use a bulb with a car as a test lamp to check whether there is a broken road failure in the circuit.
(3) When the car circuit faults occur in the car circuit device, the circuit breaking method can be judged. After the circuit segment with an iron failure is about to be disconnected, the iron failure in the electrical equipment still exists to determine the circuit to set up the iron iron iron. The location and reason.
(4) There is a disconnection failure in the short -circuit method vehicle circuit. You can also use a short -circuit method to judge, that is, the circuit that is suspected of disconnecting the failure of the circuit failure is used to observe the change of the instrument or the work of the electrical equipment to judge the circuit. Whether there is a disconnection failure.
(5) Observe the instructions of the current meter, water temperature meter, fuel meter, oil pressure gauge, etc. on the instrumental dashboard, and determine whether there is any failure in the circuit. For example, when the engine is cold, when connecting the ignition switch, the water temperature gauge indicates that the full scale is not moving, indicating that the water temperature meter sensor is faulty or the line has an iron.
(6) The low -voltage iron trial method is to remove the metal part of the car's metal part of the car's metal part to judge. This method is relatively simple, which is often used by the majority of automobile maintenance electricians. The iron testing method can be divided into two types: direct iron and indirect iron.
The so -called direct ironing is a strong spark on the iron without load. For example, we need to determine whether the circuit from the ignition coil to the battery is faulty. The wire header of the ignition coil can be removed on the ignition coil to scrape the car body or frame. If there is a strong spark, it means that the circuit is normal; if there is no spark no spark, there is no spark Explanation shows that the circuit is disconnected.
The indirect iron is to determine whether the line or load fails through a load of a car electrical appliance to generate a weak spark. For example, if the traditional ignition system is connected to the iron, if there is a spark, it means that this line is normal; if there is no spark, it means that the circuit has a disconnection. It is particularly noteworthy that the test method cannot be applied on electronic route cars.
(6)The high -voltage fire test method is carried out on the high -voltage circuit, observed the situation of electric sparks, and judged the work of the ignition system. The specific method is to remove the high -voltage wires of the ignition coil or spark plug, align it to the spark plug or cylinder head, etc., the distance is about 5mm, and then connect the boot switch to rotate the engine to see its jumping situation. If the spark is strong, the sky is blue, and the sound of jumping fire is loud, it indicates that the work of ignition system is basically normal; otherwise, it shows that the work of ignition system is not normal.
The disconnection refers to the mechanical disconnection of the current channel. In the series circuit, if the current is interrupted, the circuit stops working. In the parallel circuit, if a branch road is disconnected, this branch stops running, and other branch circuits work as usual. When using a resistor to detect the diverticity, the circuit can be discovered .

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