How To Check Car Battery Voltage With Multimeter. The battery values vary from car to car so the voltage range you can set for the multimeter is quite broad ranging from 15V to 20V. DC voltage is usually marked as a V followed by a short line with a dotted line beneath it.
How to tell if a car battery is bad or dying. Then compare it to the voltage figures below. Bad battery or bad alternator how to tell the difference.
How to tell if a car battery is bad or dying.
We are setting up a multimeter along with the battery to test. Second we will measure the current. If the multimeter reading drops below 135 volts the alternator is struggling to properly charge the battery and may need replacement. On some car models the voltage of the battery can be checked at the dashboard but that wont help you know how good is your battery since the voltage reading in the dashboard actually shows the power coming from the alternator and not the battery.
