Troubleshooting Guide 3 Amp Battery Charging System With 70 Watt Lighting Stator - Kohler Courage SV470 Service Manual

Section 7
Electrical System and Components

Troubleshooting Guide 3 Amp Battery Charging System With 70 Watt Lighting 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
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 infinity 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 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.
7.8
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, 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 0.2 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.