How To Use Multimeter To Check Car Battery. Set your multimeter to voltage and ensure its adjusted to 20 DC volts or if your voltmeter. We will use a 9-volt transistor battery for this guide.
Touch the red probe positive onto the positive red. So place the black lead of the multimeter to the negative terminal of the battery. Second we will measure the current.
Set the dial to 20 which will allow you to accurately measure between 0-20 Volts.
Then place the multimeter leads on the battery terminals in the order of positive to positive and negative to negative. If your voltage drops below 5 when the car is running it is. With a multimeter you can check the potential difference of a battery which will tell you whether the battery is good or not. Touch the red probe to the positive terminal and the black probe to the negative terminal.
