Kohler COMMAND CV11-16 Service Manual page 71

Troubleshooting Guide 3 amp Battery Charging System with 70 Watt Lighting Stator
NOTE: Zero ohmmeters on each scale to ensure accurate readings. Voltage tests should be made with engine
running at 3000 RPM - no load. Battery must be fully charged.
Problem
1. With engine running at 3000 RPM,
measure voltage across battery terminals
using a DC voltmeter.
2. Disconnect the charging lead from battery.
With engine running at 3000 RPM,
measure voltage from charging lead to
ground using a DC voltmeter.
3. With charging lead disconnected from
battery and engine stopped, measure
resistance from charging lead to ground
No using an ohmmeter. Note reading.
Charge
To Reverse the leads and measure resistance
Battery
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. Cut the sleeving on the charging lead to
expose the diode connections.
Measure the resistance from the stator side
of diode to ground using an ohmmeter.
1. Make sure lights are not burned out.
2. Disconnect the lighting lead from the wiring
harness.
With engine running at 3000 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.
Electrical System and Components
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 20 volts or more, stator
winding is OK.
If voltage is less than 20 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 0.5 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 0.2 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.
Section 8
8
8.11