0:234:57Trojan Tips 2 - Determining the Health of a Deep-Cycle Battery - YouTubeYouTubeStart of suggested clipEnd of suggested clipFrom the voltmeter connect. It to the positive terminal on the battery you take the negative probeMoreFrom the voltmeter connect. It to the positive terminal on the battery you take the negative probe which is black and connect it to the negative terminal on the battery. And you read the voltage.