Kohler COMMAND CH18-745 User Manual download pdf (Page 138)

8.21

Section 8

Electrical System and Components

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 good and fully charged.

Problem

Charge

Battery

Lights

Test

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 using an ohmmeter.

Note reading.

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. 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 ground using an

AC voltmeter.

3. With engine stopped, measure the resistance

of stator from lighting lead to ground using an

ohmmeter.

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

(Tests 2, 3 and 4).

2. If voltage is 28 volts or more, stator winding is

OK.

If voltage is less than 28 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 1.07 ohms,

stator winding is OK.

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 15 volts or more, stator is OK.

Check for loose connections or shorts in wiring

harness.

If voltage is less than 15 volts, test stator using

an ohmmeter (Test 3).

3. If resistance is approximately 0.4 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.

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Kohler COMMAND CH18-745 User Manual Page 138

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