Place the sensor on the end of the black wire on the negative battery terminal. Look at the digital or meter display on the multimeter or voltmeter. It should read 6 volts if the battery is in good condition and is at least 20 percent charged. If it reads less than 5 volts, recharge the battery.
How to charge and maintain 12 volt and 6 volt batteries.. Get a 12-volt troubleshooting light/test lamp from any auto store cheap or make your own. (
Here's how to test the capacity of a 12 volt battery with an inverter, a lightbulb, and an electric clock.. To make a real 12 volt deep cycle battery, take two 6 volt T105 golf cart batteries and. This is the important test for a car's starting battery.
dahermit,You cannot load test a 6volt automotive type battery with a multimeter alone.And like awhtx said if its six years old its sulfated and .