An alternator is a device that converts mechanical energy to electrical energy. In a vehicle, the alternator is responsible for charging the battery and providing power to the electrical system. The alternator output current is the amount of electrical current that the alternator is producing. It is important to check the alternator output current regularly to ensure that the alternator is functioning properly and that the electrical system is receiving the power it needs.
There are a few different ways to check the alternator output current. One way is to use a multimeter. To do this, set the multimeter to the DC voltage setting and connect the positive lead to the positive terminal of the battery and the negative lead to the negative terminal of the battery. Start the engine and let it idle. The multimeter should read the voltage of the battery. If the voltage is below 12.5 volts, the alternator may not be charging the battery properly.