Kohler COMMAND CV11-16 Service Manual page 72

Section 8
Electrical System and Components
Troubleshooting Guide 3 amp/70 Watt Braking Stator
NOTE: Zero ohmmeteres on each scale to ensure accurate readings. Voltage tests should be made with engine
running at 3400 RPM - no load. Battery must be fully charged.
Problem
1. With engine running at 3400 RPM,
measure voltage across battery terminals
using a DC voltmeter.
2. Disconnect the charging lead (black) from
the wiring harness.
With engine running at 3400 RPM,
measure voltage from charging lead to
ground using a DC voltmeter.
3. With charging lead disconnected from
battery and engine stopped, measure
No
resistance from charging lead to ground
Charge
using an ohmmeter. Note reading.
To
Battery
Reverse the leads and measure
resistance again.
In one direction, the resistance should be
infi nity ohms (open circuit). With the leads
reversed, some resistance should be
measured (about midscale on Rx1 range).
4. Disconnect the lighting lead (yellow) from
the wiring harness.
Measure the resistance from the lighting
lead to ground using an ohmmeter.
1. Make sure lights are not burned out.
2. Disconnect the lighting lead (yellow) from
the wiring harness.
With engine running at 3400 RPM,
measure voltage from lighting lead to
No
ground using an AC voltmeter.
Lights
3. With engine stopped, measure the
resistance of stator from lighting lead to
ground using an ohmmeter.
8.12
Test Conclusion
1. If voltage is more than 12.5 volts, charging
system is OK.
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. If voltage is 5 volts or more, stator winding
is OK.
If voltage is less than 5 volts, test stator
using an ohmmeter (Tests 3 and 4).
3. If resistance is low in both directions, the
diode is shorted. Replace the diode.
If resistance is high in both directions, the
diode or stator winding is open.
(Use Test 4.)
4. If resistance is approximately 0.15 ohms,
stator winding is OK.
If resistance is 0 ohms, stator winding is
shorted. Replace stator.
If resistance is infi nity ohms, stator winding
or lead is open. Replace stator.
1. Replace burned out lights.
2. If voltage is 13 volts or more, stator is OK.
Check for loose connections or shorts in
wiring harness.
If voltage is less than 13 volts, test stator
using an ohmmeter (Test 3).
3. If resistance is approximately 0.15 ohms,
stator is OK.
If resistance is 0 ohms, stator is shorted.
Replace stator.
If resistance is infi nity ohms, stator or
lighting lead is open. Replace stator.