Advertisement
Electrical System
c. If a carbon pile test tool is available, connect tool
to battery posts (Red positive +/Black negative -)
turn load knob counterclockwise (no load). Start
and run engine at high speed (3600 RPM
optimal), adjust carbon pile voltage to 12 volts
and observe amperage on amp meter. Displayed
amperage should be near or at maximum rated
system output. (Follow tool directions for carbon
pile test procedures.)
Condition
Charge rate increases
when load is applied.
Charge rate does not
increase when load is
applied
5. With engine off , remove terminal block cover from
rectifi er-regulator and inspect ring terminals and
rectifi er-regulator studs for corrosion/arcing/damage.
Repair/replace as needed. If OK, proceed to next
test.
6. Label each yellow stator wire (1, 2, 3) on ring
terminal sheathing. Remove nuts retaining stator
eyelets and cover each ring terminal with electrical
tape, to ensure no accidental contact can be made.
NOTE: DVOM must be able to read to 0.05 ohms.
Set DVOM to AC volts, place test lead to each
yellow stator wire ring terminal (under tape). Run
engine at high speed and monitor voltage. Measure
between each stator lead and ground (1-ground,
2-ground, 3-ground).
Condition
Voltage is 17 volts AC or
more.
Voltage is less than 17
volts AC.
7. With engine off and stator ring terminals removed
from rectifi er-regulator, check for resistance/
continuity between across stator leads (yellow wires;
1-2, 1-3, 2-3).
Condition
Resistance is 0.1/0.2
ohms.
Resistance is 0 ohms.
Resistance is infi nity
ohms/no continuity.
154
Conclusion
Charging system is OK
and battery was fully
charged.
Test stator and rectifi er-
regulator (steps 5-8).
Conclusion
Stator is OK.
Stator is faulty. Continue
with steps 7 and 8).
Conclusion
Stator coil is OK.
Stator is shorted; replace.
Stator is open; replace.
KohlerEngines.com
8. With engine off and stator ring terminals removed
from rectifi er-regulator, check for resistance/
continuity from stator leads (yellow wires) to ground.
Condition
Resistance is infi nity ohms
(no continuity).
Resistance (or continuity)
measured.
9. If stator tests good (steps 5-8), but system was
identifi ed in step 4 as not working, failure is likely
with rectifi er-regulator. Replace rectifi er-regulator,
retest system to confi rm repairs (step 4).
FUSES (High Output Charging System)
Engines equipped with a high output charging system
have one (1) 60-amp large blade type automotive fuse,
in addition to three (3) blade type automotive fuses.
However, 30-amp fuse is then nonfunctional as 30-
amp charging circuit has been disabled. Purple charge
wire ring terminals in main engine wiring harness are
completely sealed and retained using a special heat
shrink cap for non use. No service is required for this
circuit.
Replacement fuses must have same rating as blown
fuse. Use fuse chart below to determine correct fuse.
Wire Color
2 Purple Wires
1 Red Wire w/Black Stripe
1 Red Wire w/White Stripe
2 Red Wires
High Output Charging System adds
In separate wiring harness
Fuse Replacement
1. Shut engine off and remove key.
2. Locate fuse holders.
3. Remove fuse cover and pull out fuse.
4. Inspect fuse for a solid fusible link or a broken
fusible link. Replace fuse if fusible link is broken. If
you are not sure if fusible link is broken, replace
fuse.
5. Insert fuse into fuse holder until it is seated properly.
Install fuse cover.
6. If replacement fuse fails, there is a problem within
circuit. Diagnostics are required. Identify which
circuit is aff ected (see EFI System for electrical
schematic) by identifying failed fuse/circuit. Perform
troubleshooting procedures appropriate for circuit
fuse that failed.
7. Install fuse holder into fuse cover.
Conclusion
Stator is OK (not shorted
to ground).
Stator leads are shorted to
ground; replace.
Fuse Rating
30-amp Fuse
10-amp Fuse
10-amp Fuse
Kohler 60-amp Fuse
24 690 01 Rev. S
Advertisement
