A fully charged, serviceable generator is one of the prerequisites for trouble-free operation of the engine and the entire vehicle. The principle of operation of the battery is simple, the battery stores electricity, and if necessary, start the engine gives a charge, which allows you to provide a spark in the spark plugs. The generator is responsible for charging the battery in the car, which converts the mechanical energy of the engine into electrical energy. This is known by the experts who give cash for cars.
With a properly working generator, the battery will always be recharged, which eliminates problems with starting the engine even in severe frost. However, if for some reason the generator cannot provide the required voltage in the system, this leads to insufficient battery charge, which not only cannot start the engine, but the electrolyte in it quickly boils, which renders the battery unusable.
How much should the generator give
The motorist will need to regularly check the voltage on the battery and alternator. Moreover, both insufficient battery charge and excessive voltage from the generator are dangerous, which can also lead to serious malfunctions. It is extremely important to know what kind of charge the generator gives to the battery; for such a check, you can use a regular multimeter.
Symptoms of a malfunctioning generator are as follows:
1. Insufficient battery charge or electrolyte boiling.
2. The appearance on the dashboard of the warning alarm about the malfunction of the battery.
3. Dimly shining dimensions and headlights.
4. Grinding and whistling of the generator during operation.
When performing generator diagnostics, a multimeter measures current, voltage and resistance. A working generator should supply the battery from 5 to 14.5 volts. If the generator charge is less or more than this indicator, then this indicates the presence of malfunctions.
The alternator voltage measurement can be performed using a multimeter and a voltmeter. Ordinary car owners can be advised to purchase a multimeter, which is easy to use and can be connected in any order to the battery.
Causes of generator problems
The generator can have many elements that fail, which leads to various kinds of malfunctions and insufficient battery charging. Such problems can arise both in the mechanical part, including with bearings and a drive, and in electrics, for example, with brushes, a diode bridge burnout or winding closure is noted. It is also recommended to additionally check the generator relay-regulator.
Most often, it is not possible to independently diagnose the generator, the car must be driven to the service, where a professional using special equipment will determine the existing breakdowns. Depending on the identified malfunctions, the generator is repaired or replaced with a new one, which allows you to completely restore the car, eliminating problems with the battery.