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Purpose
The regulator/rectifier prevents battery boiling by
shutting off the current when the battery has reached
14.7 volts.
How It Works
The voltage regulator rectifies the current so that the
battery sees only positive current and voltage. The
voltage level across the battery is very near constant
because the battery has very low impedance. This
regulator/rectifier, like many others, must be connected
to the battery to function. Once the voltage level of the
battery has surpassed 14.7 volts, the voltage regulator
shuts off all current and no charging takes place. When
the voltage again drops below the specified level, the
voltage regulator turns the current back on at the rated
amperage of the alternator.
Testing
1.
Connect a DC voltmeter across the battery.
2.
Run the engine at 3600 RPM.
V. If the voltage reading is between 13.6 and
14.2 volts, DC the charging system is OK.
W. If the voltage reading is greater then 14.2
volts, DC replace the regulator.
X. If the Voltage reading is less then 13.6 volts,
DC test the alternator.
Mid-Mount Z Service Manual
ELECTRICAL SYSTEMS
Regulator/Rectifier
7 - 21
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