How To Tell What Voltage Your Car Battery Is. The temperature outside affects the voltage of the battery. With the engine off you should get a reading of 126 volts.
If you dont have a multimeter to tell you the voltage of your battery you can do a test of your electrical system by starting the. A fully charged battery will typically display a voltmeter reading of about 126 to 128 volts. Answer 1 of 4.
Turn off the ignition and any accessories like lights or the radio in the vehicle.
Check the reading. Check the reading. Ad Need a New Battery. Measuring your car batterys voltage can be a great way to determine how charged your battery might be.
