8.9
Section 8
Electrical System and Components
8
Problem Test Conclusion
No Charge to
Battery
1. Refer to Figure 8-10. Separate the
bullet connector in the white lead
from the rectifi er-regulator. Connect
an ammeter from the female terminal
to the positive (+) terminal of the
ba ery. Connect a DC voltmeter from
the female terminal to the negative (-)
terminal of the ba ery. Leave the other
rectifi er-regulator leads connected in
the normal manner. Run the engine at
3600 RPM and read the voltage on the
voltmeter.
If voltage is 14.0 volts or more, place a
minimum load of 5 amps* on ba ery
to reduce voltage. Observe ammeter.
*NOTE: Turn on lights (if 60 wa s or
more) or place a 2.5 ohm, 100 wa
resistor across ba ery terminals.
1. If voltage is 14.0-15.0 volts and charge rate
increases when load is applied, the charging
system is OK and the ba ery was fully
charged.
If voltage is less than 14.0 volts or charge rate
does not increase when load is applied, test
stator (Tests 2 and 3).
2. Separate the bullet connectors in
the AC (white) leads. Connect an
AC voltmeter across the stator leads
(female terminals). With engine
running at 3600 RPM, measure the AC
output from the stator.
2. If voltage is 20.0 volts or more, stator is OK.
Rectifi er-regulator is faulty. Replace the
rectifi er-regulator.
If voltage is less than 20.0 volts, stator is
probably faulty and should be replaced. Test
stator further using an ohmmeter (Test 3).
3. With the engine stopped, measure
the resistance from each stator lead to
ground using an ohmmeter.
3. If the resistance is infi nity ohms (no
continuity), the stator is OK (not shorted to
ground).
If resistance (or continuity) is measured, the
stator leads are shorted to ground. Replace
stator.
Battery
Continuously
Charges at
High Rate
1. Perform same test as Step 1 above. 1. If the voltage is 15.0 volts or less the charging
system is OK. The ba ery is unable to
hold a charge. Service or replace ba ery as
necessary.
If voltage is more than 15.0 volts, the
rectifi er-regulator is faulty. Replace the
rectifi er-regulator.
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