How Do You Check Car Battery. Check your car manual for information. Once the connections are complete start the engine and increase the speed to 2 rpm.
With the lights still on crank the engine and see what happens. Now that we have verified that the battery is experiencing a parasitic draw we can move to exploring the different. If you do not have a voltmeter you can check a car battery with a performance certificate.
A number that is 0-9 and a letter that is A-L.
Place the red lead on the positive battery terminal indicated by a red cover or a symbol. If you do not have a voltmeter you can check a car battery with a performance certificate. With the lights still on crank the engine and see what happens. So you have a parasitic battery draw.
