Component Testing
For accurate resistance and/or continuity checks, elec-
trically disconnect the component being tested from the
circuit (e.g. unplug the ignition switch connector before
doing a continuity check).
CAUTION
When testing electrical components for continu-
ity with a multimeter (ohms setting), make sure
that power to the circuit has been disconnected.
NOTE: For more component testing information, see
the Kubota Workshop Manual for 03 Series Diesel En-
gine.
Ignition Switch
The ignition (key) switch has three positions (OFF, RUN,
and START). The terminals are marked as shown. The
circuitry of the ignition switch is shown in the chart. With
the use of a multimeter (ohms setting), the switch func-
tions may be tested to determine whether continuity ex-
ists between the various terminals for each position.
Verify continuity between switch terminals.
A
Y
B
S
I
SWITCH
POSITION
NORMAL
CIRCUITS
OTHER
CIRCUITS
X
OFF
RUN
NONE
B + A + I
B + S + I
NONE
X + Y
Figure 3
START
NONE
HEX NUT
KEY
SWITCH
LOCK WASHER
Figure 4
OFF
45
°
RUN
45
°
START
Figure 5
Electrical System (Rev. C)
Page 5 − 20
Reelmaster 4000−D
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