Kohler Command CV17 Service Manual page 47

3 Amp/70 Watt Lighting Stator
NOTE: Zero ohmmeteres on each scale to ensure
accurate readings. Voltage tests should be made
with engine running at 3000 RPM with no load.
Battery must be good and fully charged.
To test charging system for no charge to battery:
1. With engine running in fast setting, measure voltage
across battery terminals using a DC voltmeter.
Condition
Voltage is more than 12.5
volts.
Voltage is 12.5 volts or
less.
2. Remove connector from rectifi er-regulator. With
engine running in fast position, measure AC voltage
across stator leads using an AC voltmeter.
Condition
Voltage is 28 volts or
more.
Voltage is less than 28
volts.
3. With charging lead disconnected from battery and
engine stopped, measure resistance from charging
lead to ground using an ohmmeter. Note reading.
Reverse leads and measure resistance again.
In one direction, resistance should be infi nity ohms
(open circuit). With leads reversed, some resistance
should be measured (about midscale on Rx1 range).
Condition
Resistance is low in both
directions.
Resistance is high in both
directions.
4. Cut sleeving on charging lead to expose diode
connections.
Measure resistance from stator side of diode to
ground using an ohmmeter.
Condition
Resistance is
approximately 1.07 ohms.
Resistance is 0 ohms.
Resistance is infi nity
ohms.
24 690 07 Rev. B
Conclusion
Charging system is OK
Stator or diode are
probably faulty. Continue
testing stator and diode.
Conclusion
Stator winding is OK.
Test stator using an
ohmmeter.
Conclusion
Diode is shorted. Replace
diode.
Diode or stator winding is
open. Continue testing.
Conclusion
Stator winding is OK,
diode is open. Replace
diode.
Stator winding is shorted.
Replace stator.
Stator winding or lead is
open. Replace stator.
KohlerEngines.com
To test charging system for no lights:
1. Make sure lights are not burned out.
Condition
Burned out lights.
2. Disconnect lighting lead from wiring harness.
With engine running in fast setting, measure voltage
from lighting lead to ground using an AC voltmeter.
Condition
Voltage is 15 volts or
more.
Voltage is less than 15
volts.
3. With engine stopped, measure resistance of stator
from lighting lead to ground using an ohmmeter.
Condition
Resistance is
approximately 0.4 ohms.
Resistance is 0 ohms.
Resistance is infi nity
ohms.
Electrical System
Conclusion
Replace.
Conclusion
Stator is OK. Check for
loose connections or
shorts in wiring harness.
Test stator using an
ohmmeter.
Conclusion
Stator is OK.
Stator is shorted. Replace
stator.
Stator or lighting lead is
open. Replace stator.
47