With the increasing number of EFI engine, in the maintenance of the daily vehicle, often circuit maintenance operations, such as maintenance of electrical equipment, replace the battery, the vehicle is left unused for a long time, body welding etc.. But these seemingly simple things, if improper operation may lead to two damage to the vehicle.
Specification for operation of battery:
Need to run before the North Ben V3 ignition switch off, while the need to turn off the use of electrical equipment, such as audio and other equipment, prohibit the operation of electrical equipment when the sudden power failure.
Power off sequence: from a security point of view, the maintenance, the first pull the negative electrode, and then pull the positive; when installed, just the opposite, first installed in the positive, after the installation of negative.
Why should we break the negative?
1, if the first pull cathode, because the electrode is the ground, which is around the cathode metal body is negative, so if the tool cathode wiring, encountered metal body side, it will cause beiben V3 accessories battery negative short circuit.
2, if the first pull cathode, because the metal body and the cathode around is connected, even if what would have what bad results, when the anode has pulled off, to pull the cathode will not be in danger.
3, the demolition of the first positive risk existing burning appliances of the original, especially easy to cause the computer plate burning loss.
In actual work, due to violation of operating procedures, damage to the circuit and handle a lot of people, because the North ran V3 accessories battery positive and negative pole short circuit current is very large, instantaneous high temperature.
Note: many domestic truck is not provided with a power switch, because the car driving recorder is not in accordance with legal requirements of power, if the power went off and just run out of battery, the recorder can not work, may bear legal responsibility.
Although the power switch form the truck is diverse, but in the maintenance operation especially body welding, or maintenance suggestions in accordance with the operating rules of the battery power, so as to avoid the damage of vehicle electrical equipment.