Troubleshooting Guide 3 Amp/70 Watt Braking Stator - Kohler Courage SV470 Service Manual

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 full throttle - no load. Battery must be fully charged.
Problem
1. With engine running in the fast setting,
measure voltage across battery
terminals using a DC voltmeter.
2. Remove connector from rectifier-regulator.
With engine running in the fast position,
measure AC voltage across stator leads
using an AC 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 infinity 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 in the fast setting,
No
measure voltage from lighting lead to
Lights
ground using an AC voltmeter.
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 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, diode is open. Replace
diode.
If resistance is 0 ohms, stator winding is
shorted. Replace stator.
If resistance is infinity 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 infinity ohms, stator or
lighting lead is open. Replace stator.
Section 7
7
7.9