Voltage

This test determines voltage available from the battery and should be the first step in any electrical troubleshooting procedure after visual inspection. Many electrical problems, especially on computer controlled systems, can be caused by a low state of charge in the battery. Excessive corrosion at the battery cable terminals can cause poor contact that will prevent proper charging and full battery current flow.

1) Set the voltmeter selector switch to the 20V position.
2) Connect the multimeter negative lead to the battery's negative (–) post or terminal and the positive lead to the battery's positive (+) post or terminal.
3) Turn the ignition switch ON to provide a load.
4) A well charged battery should register over 12 volts. If the meter reads below 11.5 volts, the battery power may be insufficient to operate the electrical system properly.