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No, it should read about 12½ with the motor NOT running and higher (13-14)
with the motor running. If it only reads 12½ with the motor running, if it
is reading correctly, your charging system is not doing its job and your
battery will run down.
Better get a separate voltmeter and check it out. And it should never read
higher than 13 with the engine not running because the battery's normal
voltage is 12.6. It takes more than that to charge it because you have to
force current back through it to charge it.
If it is reading 16 volts without the engine running the meter is at least
highly suspect.
--
George Downs Bartlesville, Heart of the USA!
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