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 on the switch).
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 engine component testing information, see
the Kubota Workshop Manual, Diesel Engine, 05 Se-
ries.
Ignition Switch
The ignition (key) switch has three positions: OFF, RUN
and START (Fig. 5). The switch terminals are identified
as shown in Figure 6.
OFF
45°
RUN
Testing
45
°
1.
Make sure ignition switch is in the OFF position. Dis-
connect wire harness connector from ignition switch.
START
2.
The circuitry of the ignition switch is shown in the
chartbelow.Withtheuseofamultimeter (ohmssetting),
theswitchfunctionsmaybetestedtodeterminewhether
continuity exists between the various terminals for each
switch position. Verify continuity between switch termi-
nals.
Figure 5
A
SWITCH
NORMAL
OTHER
POSITION
CIRCUITS
CIRCUITS
B
OFF
RUN
NONE
B + A + I
B + S + I
NONE
X + Y
Y
S
START
NONE
I
X
Figure 6
Groundsmaster 3505--D
Page 5 -- 9
Electrical System
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