TESTING MY BATERRY CHARGER METHOD 2 1 Turn on your vehicle’s battery. Once the battery is on, switch on the headlights to “load” the battery and reduce any surface charge that the battery may have built up. However, don’t start the engine just yet. Before you test how well the battery is charging, you’ll take what’s known as a “static” reading to confirm the battery’s current level of charge. [10] If you like, you can also turn on your vehicle’s radio, fan, emergency flashers, and other electrical components to load the battery even more. [11] Eliminating surface charge helps to ensure a reading that accurately reflects the alternator’s charging capabilities. 2 Set your multimeter to “DC. " Turn the dial that controls your multimeter’s test mode so that it’s primed to measure DC current in the next-highest voltage range to your vehicle's battery. Like small appliance batteries, car batteries rely on direct current electricity to power the m...
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