First, power cord. The power cord is generally in the inside of the decorative board and the central electrical box wire below the steering wheel. You can also directly connect the battery positive pole. We can pull out the car key, use one end of the test pen to find the iron, and then find the thicker line in the wiring beam. The other end of the test pen is tested on this wire joint. If the test stroke light is on, it means that this line is the power cord.

　　Second, oil -breaking lines. The fuel -breaking point is connected in the orthopedic line of the oil pump. It can generally be found in the fuel tank, the left and right front door beams, and the central appliance box. We find a thicker thread in the online bundle and test the same method in the same way. Then the incineration switch is reached to the "ON" gear. When the car is not launched, the line will be about 3 seconds of positive electricity, and then it will restore the state of powerless. After the car is mobilized, this line will be positive. It is the positive polar line of the oil pump.

　　Third, ACC line. The ACC line is generally in the same line as the power line. It is the basis for the host to determine whether the vehicle is in a state of launch. Let's find the thicker lines in the beam of the incineration switch line, or take the test pen to test it in the same way: hit the incineration switch to the ACC or ON file. At this time, the light of the test pen is bright; The lantern will be extinguished. If this operation is in line, this line is the ACC line.

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