Kohler Aegis ELH775 Service Manual page 57

3. With engine stopped, measure resistance across
stator leads using an ohmmeter.
Condition
Resistance is 0.1/0.2
ohms.
Resistance is 0 ohms.
Resistance is infi nity
ohms.
4. With engine stopped, measure resistance from each
stator lead to ground using an ohmmeter.
Condition
Resistance is infi nity ohms
(no continuity).
Resistance (or continuity)
measured.
Test Charging System for Battery Continuously
Charging at High Rate
1. With engine running at 3600 RPM, measure voltage
from B+ lead to ground using a DC voltmeter.
Condition
Voltage is 14.7 volts or
less.
Voltage is more than 14.7
volts.
To Test 25 amp Rectifi er-Regulators
NOTE: When installing rectifi er-regulator, take note of
terminal markings and install plug(s) accordingly.
NOTE: Disconnect all electrical connections attached to
rectifi er-regulator. Testing may be performed
with rectifi er-regulator mounted or loose. Repeat
applicable test procedure two or three times to
determine condition of part.
NOTE: A fl ashing LOW light can also occur as a result
of an inadequate ground lead connection. Make
certain connection location is clean and clamp is
secure.
Testing rectifi er-regulator may be performed as follows,
using appropriate rectifi er-regulator tester.
1. Connect tester ground lead (with spring clamp) to
body of rectifi er-regulator.
2. Connect red lead from tester to middle terminal
labeled B+.
3. Connect black leads from tester to both outer AC
terminals on rectifi er-regulator.
4. Plug tester into proper AC outlet/power supply for
tester being used. Turn on power switch. POWER
light should be illuminated and one of four status
lights may be lit as well. This does not represent
condition of part.
5. Press TEST button until a click is heard and then
release. Momentarily one of four status lights will
illuminate indicating partial condition of part.
66 690 14 Rev. A
Conclusion
Stator is OK.
Stator is shorted; replace.
Stator is open; replace.
Conclusion
Stator is OK (not shorted
to ground).
Stator leads are shorted to
ground; replace.
Conclusion
Charging system is OK.
Battery is unable to hold
charge; service or replace.
Faulty rectifi er-regulator;
replace.
KohlerEngines.com
Condition
OK (green) light comes on
and stays steady.
NOTE: A fl ashing LOW
light can also
occur as a result
of an inadequate
ground lead
connection. Make
certain connection
location is clean
and clamp is
secure.
Other lights come on.
Electrical System
Conclusion
Disconnect tester black
lead attached to 1 AC
terminal and reconnect
it to other AC terminal.
Repeat test. If OK (green)
light comes on again, part
is good and may be used.
Rectifi er-regulator is faulty
and should not be used.
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