- Turn on the multimeter (volt-ohm meter) and make sure it is set to test direct current, or DC (the V with the solid, not wavy line, next to it), at a range of 20 volts
- Touch the red test lead to the red positive (+) pole on the battery and the black test lead to the black negative (-) pole on the battery
- Record the voltage displayed on the multimeter
- Voltage should be greater than 12.5 volts; if not replace battery