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 not handled properly, may lead to the two damage to the vehicle.

Operation specification of battery when power off:

Before the power off, the ignition switch should be switched off, and the power equipment should be closed, such as audio equipment, which prohibits the sudden power failure when Baotou North Heavy Truck fittings and electrical equipment is running.

Power off sequence: from a safe point of view, when the maintenance, first pull the negative pole, and then pull out the positive; installation, just the opposite, first installed positive, after the installation of negative electrode.

Why break the negative pole first?

1, if the first pull cathode, anode is due to ground, which is around the cathode metal body is negative, so if the tool cathode wiring, encountered metal body side, will cause the 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 burns a lot of people, because Baotou North heavy truck battery positive and negative 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 suggestions in accordance with the Baotou beiben heavy truck parts maintenance procedures on battery power, so as to avoid the damage of vehicle electrical equipment.