How To Check Car Battery Health With Multimeter. Once youre done removing your car batterys surface charge you may proceed with connecting the voltmeter or multimeter. How to use a cen-tech digital multimeter to check car battery.
The wavy line after a V is AC alternating current voltage and is. How to Check Battery Voltage Using a Multimeter. At 124 volts a car battery is 75 charged while at 122 volts its 50 charged.
Ensure the ignition lights and radio are off.
After you know your multimeter is working correctly you need to select the appropriate function on your multimeter. Have a helper turn the ignition on for no longer than 15 seconds and watch the multimeter. If the battery voltage drops below 96 volts this is an indicator of a weak battery. After doing this set the dial to 20 volts so you will be able to measure 0-20 volts.
