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Troubleshooting Guide
1.25 Amp Or 3 Amp Unregulated Charging System
Optional 70 Watt Lighting
NOTE: Zero ohmmeters and voltmeters on each scale to ensure accurate readings. Voltage test should be
made with engine running at 3000 RPM -no load. Battery must be fully charged.
Problem
Test
Conclusion
1.
With engine running at 3000 RPM, measure
1.
If voltage Is more than 12.5 volts, charging
voltage across battery terminals using a DC
system Is OK.
voltmeter.
If voltage Is 12.5 volts or less, the stator or
diode are probably faulty. Test the stator and
diode (Test 2, 3, and 4).
2.
Disconnect the charging lead from battery.
2a. 1 . 25 amp. If voltage Is 11 . 5 volts or more sta-
tor winding Is OK.
With engine running at 3000 RPM, measure
2b. 3 amp. If voltage Is 28 volts or more, stator
voltage from charging lead to ground using a
DC voltmeter.
winding Is OK.
If voltage Is less than specified test stator
using an ohmmeter (Tests 3 and 4).
No
Charge
3.
With charging lead disconnected from battery
3.
If resistance Is low In both directions, the diode
To
and engine stopped, measure resistance from
Is shorted. Replace the diode.
Battery
charging lead to ground using an ohmmeter.
Note reading.
If resistance Is high In both directions, the
diode or stator winding Is open. (Use Test 4).
Reverse the leads and measure resistance
again.
In one direction, the resistance should be
Infinity ohms (open circuit). With the leads
reversed, some resistance should be
measured (about midscale on Rx1 range).
4.
Cut the sleevlng on the charging lead to ex-
4.
If resistance Is 0. 7 I 1 . 3 ohms, stator winding Is
pose the diode connections.
OK.
Measure the resistance from the stator side of
If resistance Is 0 ohms, stator winding Is
diode to ground using an ohmmeter.
shorted. Replace stator.
If resistance Is Infinity ohms, stator winding or
lead Is open. Replace stator.
1 .
Make sure lights are not burned out.
1 .
Replace burned out lights.
2.
Disconnect the lighting lead from the wiring
2.
If voltage Is 15 volts or more, stator Is OK.
harness.
Check for loose connections or shorts In wiring
harness.
With engine running at 3000 RPM, measure
voltage from lighting lead to ground using an
If voltage Is less than 15 volts, test stator us-
AC voltmeter.
lng an ohmmeter (Test 3).
No
Lights
3.
With engine stopped, measure the resistance
3.
If resistance Is approx. 0.4 ohms, stator Is
of stator from lighting lead to ground using an
OK.
ohmmeter.
If resistance Is 0 ohms, stator Is shorted. Re-
place stator.
If resistance Is Infinity ohms, stator or lighting
lead Is open. Replace stator.
8.10
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