How much current typically flows through the alternator brushes?

The correct range for current flowing through the alternator brushes is typically between 2 A and 5 A. This current is primarily used to energize the rotor winding within the alternator, enabling it to create a magnetic field that generates electricity.

The alternator's output is significantly higher than the current flowing through the brushes, as the brushes primarily supply the rotor with the necessary current to create this magnetic field while the alternator operates. The high output current generated by the alternator is directed to charging the battery and powering electrical systems within the vehicle, rather than passing through the brushes. Therefore, the lower range of 2 A to 5 A is appropriate for the brush current since it directly reflects the amount of electricity needed to induce the alternator's output rather than the total output itself.