When using a voltmeter to test a circuit which voltage test will check the charging system output under high-current draw conditions?

To test the charging system output under high-current draw conditions, you should measure the voltage at the battery terminals while the engine is running and accessories are activated (such as headlights, air conditioning, and radio). This test reflects the voltage output of the alternator under load, ensuring that it can maintain adequate voltage when the system is under strain. A healthy charging system should typically show a voltage between 13.5 to 14.5 volts in this scenario.