A voltmeter measures
electrical system pressure in volts. A voltmeter only needs to
tap into an electrical circuit (we are tapped into the power to
the Fuel Gauge). Voltmeter installation is easy, quick, and safe:
It hooks up to a fused, ignition-switched "off/on" source.
The voltmeter directly
measures the result of charging-system performance. With normal
alternator/voltage-regulator function, battery voltage is maintained
at 14.0 to 14.5 volts-and this is reported directly by the voltmeter.
In the event of alternator-system failure, voltage will be low
and continue to drop as the battery discharges. In the event of
an "overcharge" condition, the voltmeter will climb
above its normal zone.
NOTE:
Fuel Gauge points straight up because it has power but no signal.
