Causes of power outage in Hydraulic Dumping Tricycle and how to repair them

If the screws of the wire connecting the battery are loose, have poor contact or are broken, for example, the simple battery is installed under the foot pedal, and the battery compartment cover can be powered by pressing the broken wire, but if it separates when there is a bump, There will be a power outage.

If it takes a long time, the air switch will jump when the current of the air switch is less than the maximum current of the Hydraulic Dumping Tricycle. Of course, the main wire screws on both sides of the air switch will be burnt black if they are not tightened, which will also cause the air switch to jump.
After a long time, the lock cylinder is broken and cannot be connected well. When it vibrates, it will cause poor contact and power outage of the lock. In some locks, a lot of keys are strung together, which will further cause the lock cylinder to be broken, and the lock will be damaged first. Power outage.
For example, is there a poor contact in the battery connection wire, a poor contact in the wire from the battery to the lock, a poor contact in the battery negative wire, etc.
Check the lines where the front of the car is turning around. This is where the lines are more likely to break.
If the meter doesn't light up and the car doesn't run, the problem may be the answer above. If the meter doesn't light up but the car can still run, then there may be a problem with the meter's connection cable. For example, there is something wrong with the positive and negative poles of the meter. There is no bad contact, whether the solder joints of the circuit board inside the meter are loose, etc.