25 Amp Rectifier-Regulators (Original Style); 4 Amp Unregulated Rectifiers - Kohler CH18-745 Service Manual

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
Section 8
Electrical System and Components
6. Press the ''TEST'' button until a ''click'' is heard
and then release. See Figure 8-23. Momentarily
one of the four lights will illuminate indicating the
partial condition of the part.
a. If the ''OK'' (green) light comes on, disconnect
the tester black lead attached to one AC
terminal and reconnect it to the other AC
terminal. Repeat the test. If the ''OK'' (green)
light comes on again, the part is good and
may be used.
b. If any other light is displayed* in either of the
tests, the rectifier-regulator is faulty and
should not be used.
*NOTE: A flashing ''LOW'' light can also occur as a
result of an inadequate ground lead
connection. Make certain the connection
location is clean and the clamp is secure.

25 Amp Rectifier-Regulators (Original Style)

1. Connect the squared single end of the tandem
lead adapter to the B+ (center/red) lead of
rectifier-regulator being tested. See Figure
8-26.
Figure 8-26.
2. Connect the ground lead of tester (with spring
clamp), to the housing of rectifier-regulator.
3. Connect the red lead and one of the black leads
from the tester to the pair of terminals on opposite
end of adapter lead (connections are not location
specific.)
4. Connect the remaining black lead from tester to one
of the black AC (outside) leads from rectifier-
regulator. See Figure 8-27.
8.18
Figure 8-27.
5. Plug the tester into a 110 volt AC outlet/power
supply and turn on the power switch. The
''POWER'' light should be illuminated and one of
the four status lights may be on as well. See
Figure 8-22. This does not represent the
condition of the part.
6. Press the ''TEST'' button until a "click" is heard
and then release. See Figure 8-23. Momentarily
one of the four lights will relight indicating the
partial condition of the part.
a. If the "OK" (green) light comes on, disconnect
b. If any other light is displayed* in either of the
*NOTE: A flashing "LOW" light can also occur as a

4 Amp Unregulated Rectifiers

1. Connect the tester ground lead (with spring
clamp), to the body of rectifier being tested.
2. Connect the red tester lead to the B+ (center)
terminal of the rectifier and the two black tester
leads to the two AC (outside) terminals. See
Figure 8-28.
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the tester black lead attached to the AC lead,
reconnect it to the opposite side AC lead, and
repeat the test. If the "OK" light (green) again
comes on, the part is good and may be used.
tests, the rectifier-regulator is faulty and should
not be used.
result of an inadequate ground lead
connection. Make certain connection location
is clean and clamp is secure.