How To Test Car Battery Cca With Multimeter. Using a Multimeter to Test a Car Battery. After doing this set the dial to 20 volts so you will be able to measure 0-20 volts.
First make sure your multimeters voltmeter is adjusted to 20 volts DC. DC voltage is usually marked as a V followed by a short line with a dotted line beneath it. After setting the multimeter to DC you join the multimeter probes to the battery terminals and start the engine to get the read.
A fully charged battery should give out at least 126 volts so setting the dial to 20 volts is enough.
Turn off the ignition and any accessories like lights or the radio in the vehicle. It could be a bad alternator a parasitic draw or a bad battery. When the leads are separated the reading should be 1. Find the car battery.
