There are usually several reasons for not charging.
1. The generator does not produce electricity. After starting the car (the generator is operating normally), disconnect the positive terminal of the connection cable between the generator and the battery. Use the DC voltage setting of a multimeter to test the generator output terminal and frame (negative pole). If there is no voltage or the voltage is extremely low, this proves that the generator itself is defective.
In general, there are several reasons why the generator is not producing electricity: 1. Mechanical failure 2. Stator and rotor failure 3. Voltage regulating machine or power failure excitation 4. Transmission failure. You should find professionals to exclude them one by one.
2. A charging circuit failure will also result in no charging. Use the resistance range of a multimeter to directly measure the resistance between the positive and negative poles of the battery and generator. The resistance should be close to zero ohms. If it is too large, it means there is an open circuit or poor contact. Once eliminated, the problem of bad charging will be solved.
3. Battery failure or incorrect voltage can also cause poor or no charging. The battery charging voltage must match the generator generation voltage. If the generator's generation voltage is lower than the battery's charging voltage, it will not be charged. There are also issues with the battery itself that can cause it to charge improperly or fail to charge.
4. Excessive use of electrical appliances or a short circuit will result in less power output than power consumption, which will also prevent the battery from charging.
You can check the starter motor problem by making sure the battery power and wire are in good contact. 1. If there is a problem, use a screwdriver to tighten the large and small screws of the electromagnetic switch. wiring to see if it starts. If the problem is with the relay, wires or ignition switch, you can eliminate them one by one. 2. If the starter does not start, connect the two large screws of the electromagnetic switch. If the starter turns, there is a problem with the electromagnetic switch. 3. Still not turning means the starter carbon brush contact is bad or there are other internal problems. For lighting problems, you must first check if the generator voltage is 14.4 volts. If it is insufficient, check the belt tightness as well as the generator and regulator to see if there is a problem. If the tension is sufficient, youe increase the light increment.