Electrical
Troubleshooting the charging system
Condition: Battery is not charging.
Check connections and wires from the stator to the regulator to the battery.
Connect a multi meter to the leads coming from the stator. (3 White wires). Test for
an external short.
1
st
test in ohms # 1 white wire to ground
#2 white wire to ground
#3 white wire to ground
should see OL or the infinity sign.
Now test for an internal short.
2
nd
test in ohms #1 white wire to #2 white wire
#2 white wire to #3 white wire
#3 white wire to #1 white wire
We should have continuity, or small numbers. 0.32 – 0.43 ohms
now perform the 2
nd
test again with your meter set in A.C voltage.
Each pair should give a reading of 18 – 22 acv per 1000 rpm.
The next test is at the battery terminals with the unit running, set your meter in D.C
Voltage and measure charging current coming back to the battery.
This should measure between 13 and 15 D.C. volts.
1000, 2000 and 3000 rpm if there is any variation above 15 or below 12 the regulator is
in question.
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