How To Test Car Batteries With A Multimeter. With a multimeter youll be able to do this quickly and accurately. Ensure the ignition lights and radio are off.
Pop the hood locate the battery and move any terminal caps out of the way. If you dont have a voltage of around 126 volts you may have a bad battery. Turn the lights off.
Change the function to ohms and touch the leads together.
You can easily test all your car issues regarding electrical wiring spark plugs batteries audio system and headlamps. Turn the headlights on for two minutes to get rid of any surface charge the battery may have. Touch the red probe to the positive terminal and the black probe to the negative terminal. 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.
