How To Test Car Battery And Alternator With Multimeter. Set the meter to DC voltage using the 20 scale and read the display to ensure the battery is. The battery in your car has a rating of 12 volts and should have at least that to start your car.
If you have between 142 to 147 then your alternator is charging the battery correctly. Make sure your battery is fully charged. At about 80 degrees a fully charged battery will be around 125-126 volts.
Heres How To Test Your Car Battery With a Multimeter.
The temperature outside affects the voltage of the battery. If your car makes weird noises and they all seem to come from under the hood you might want to check your alternator. The battery is essential to power the car and as it does rotates the alternator at a sufficient speed to ensure that the battery is full. Ensure the ignition lights and radio are off.
