Chrysler Conquest 1988 Service Manual page 123

CHARGING SYSTEM
- Troubleshootinn
8-111
OPERATION
NOBEHAC
TROUl3LESHOOTlNG HINTS
Before Engine Starts
1.
l
First, when the ignition switch is turned to
"ON", and before the engine starts, current
flows through fuse No. 7, charging indicator
light, then to alternator, and ground, causing the
charging indicator light to go on.
2.
When Alternator is Generating Current
a
l
Once the engine starts, battery voltage is
applied to alternator S terminal. The battery
voltage imposed on this terminal is monitored by
3.
the IC voltage regulator, and according to the
voltage detected, the IC voltage regulator reg-
ulates the alternator field coil current, thus
controlling the current the alternator generates.
l
Once the alternator starts generating current, a
voltage, slightly higher than battery voltage is
applied to L terminal. This prevents current from
flowing to the charging indicator light and the
light goes off.
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At alternator B terminal, a load current pro-
portional to the battery voltage is produced and
is sent to any load.
Remarks
The alternator relay is to ensure charging the battery
even when the charging indicator light bulb is burnt
out.
Charging indicator light does not go on when the
ignition switch is turned to "ON", before the
~~
engine starts
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Check the bulb.
Charging indicator light fails to go off once the
engine starts
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Check drive belt tension.
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Check the IC voltage regulator.
Discharged or overcharged battery
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Check the IC voltage regulator.