There are four wires coming out of the generator, which should be three live wires and one neutral wire. One end of the three live wires is the live wire and the other end is grounded with the neutral wire.
How many wires are there in general generators? Each wire or terminal has required markings. After servicing the generator, the generator wiring must be connected correctly according to the markings.
When generator lead wires or terminals are not marked, or the markings are unclear, or the meaning of the markings is forgotten, the following methods can be used to identify the generator wires. earth.
1. Fire test method. When the generator is working normally, use a wire to scratch. If sparking occurs when a certain wire is scratched against the other two wires, then the wire is the ground wire and the other wires are for line of sight.
2. Voltmeter measurement method. When the generator is operating normally, connect the test lead on one end of the voltmeter to one of the lead wires and connect the other lead to the other lead wires. The voltage between the ground wire and the live wire is less than the voltage. between two live wires. For example, if the voltage between a certain wire and other wires is around 6 volts, the wire is a ground wire. If you don't have a voltmeter, you can also use a 12 volt bulb (the voltage is too low and the bulb is easy to burn out), connect it to the two lead wires and determine the voltage. depending on the brightness of the light. When the ground wire and the live wire are connected, the light is darker, and when the two live wires are connected, the light is brighter.
Why does the line from the car's alternator to the battery get hot?
Have you eversays the reason is that the ground is shorted, causing an overload and large current. in the generator winding line, the higher the current, the greater the heat, and of course it will burn.
No electrical charge can exceed its nominal value. It's the same as a person. If you put a thousand kilos of weight on him, he will be crushed, crushed and crushed to death.
Reason:
There are two potential causes internal and external to the hot connection line between the car's alternator and the battery. The internal cause is the flow of a large current. At this time, the power dissipation makes the transmission line hot; another reason is that other heating units make the transmission line a good heat conductor, its own temperature rises and becomes hot. ?
The two reasons above are easy to troubleshoot. Use a temperature sensing gun toinfrared distance to measure the temperature of the generator and battery near the wire and directly connected to the wire to see if it is within a reasonable range. range.
At the same time, an ammeter is connected in series to the transmission line to measure the average current. When the current is abnormal, the most likely cause is the change in the internal resistance of the battery. At this point, it is necessary to determine whether the battery defect is repairable or irreparable, then repair and replace it. It is not excluded that there are other circuit problems, and detailed troubleshooting can be carried out from the source, transmission line and load end.
Detailed information:
Precautions for automobile generators:
1. Frequently clean the scale and dust on the surface of the generator. . Keep it clean and well ventilated.
2. Frequently check the tightening conditions of the generator-related fasteners and tighten the screws in time.
3. The tension of the transmission belt must be appropriate. If it is too loose, it will slip easily and result in insufficient power production; if it is too tight, it will easily damage the belt and generator bearings.
4. When installing the battery, be careful not to install it incorrectly. Usually, install the positive wire first and not the ground wire, otherwise the diode will burn out easily.
5. When using an integrated circuit regulator, the ignition switch should be turned off immediately when the engine is not running.
6 It is never allowed to use the “scratching” method to test whether electricity should be produced.