- 1). Test the voltmeter before installing it by connecting its positive (+) wire to the battery, then touching the negative (-) wire to negative terminal. The voltmeter should indicate a voltage of 12.5 volts. Remove the voltmeter's wires from the battery.
- 2). Select a location for your voltmeter on your motorcycle. Fully faired motorcycles often present more choices, but you must choose wisely to avoid unnecessarily damaging the expensive bodywork.
- 3). Splice the positive (+) wire from the voltmeter into a switched circuit, such as the speedometer lighting wire. This will prevent the voltmeter from drawing power when the motorcycle is off.
- 4). Ground the voltmeter's negative (-) wire. You may run the negative (-) wire back to the battery or ground the meter by connecting it to a screw or bolt on the frame.
- 5). Turn the ignition switch to the "ON" position and take note of the voltmeter's reading. A properly charged battery should read at or around 12.5 volts. Start the motorcycle and check the voltmeter. If your motorcycle's charging system is operating properly, the meter should reflect a voltage of 13.8 to 14.5 volts.
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