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ELECTRICAL
CHARGING SYSTEM
Charging System Diagram
The charging system consists of:.
• Battery
• Stator / Alternator
• Rectifier / Regulator
The rectifier / regulator is responsible for converting AC voltage
to DC voltage.
Charging System Testing
Perform the following tests if charging system problems are
suspected:
Current Draw - Key Off
CAUTION
Do not connect or disconnect the battery cable or
ammeter with the engine running. Damage will occur to
electrical components.
Connect an ammeter in series with the negative battery cable.
Check for current draw with the key off. If the draw is excessive,
loads should be disconnected from the system one by one until
the draw is eliminated. Check component wiring as well as the
component for partial shorts to ground to eliminate the draw.
Current Draw Inspection
Key Off
Current Draw - Key Off:
Maximum of .01 DCA (10 mA)
12.20
Battery Charge Test
CAUTION
Do not allow the battery cables to become disconnected
with the engine running. Follow the steps below as
outlined to reduce the chance of damage to electrical
components.
1.
Verify the battery is fully charged and in good condition.
2.
With the engine running, connect the multimeter to the
positive and negative battery terminals.
3.
Test for Vdc with the multimeter.
4.
The meter display should read approximately 14.0 - 14.4
Vdc at idle.
5.
If the voltage is lower than 14.0 - 14.4 Vdc, the alternator
should be tested.
Stator / Alternator Tests
Three tests can be performed using a multimeter to determine
the condition of the stator (alternator).
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