What effect does excessive resistance in the voltage side of the charging circuit have?

Excessive resistance in the voltage side of the charging circuit leads to a low charging rate. This happens because the increased resistance restricts the flow of current from the alternator to the battery. When the charging circuit experiences high resistance—such as from corroded connections, damaged wiring, or poor contacts—less current can reach the battery, ultimately resulting in a slower charging rate.

In a properly functioning charging system, the alternator is designed to provide a sufficient voltage and current to recharge the battery effectively. However, when resistance increases, it diminishes the effectiveness of this process. Therefore, it is crucial to ensure that the connections in the charging circuit are clean and secure to minimize resistance and maintain an optimal charging rate.