Groundsmaster 3500Page 6 − 14Electrical System
Component Testing
For accurate resistance and/or continuity checks, dis-
connect the component being tested from its electrical
circuits (e.g. unplug the ignition switch connector before
doing a continuity check on the switch).
NOTE: For additional electrical component testing in-
formation, see the Kubota Workshop Manual for 05
Series Diesel Engines, or the Kubota Workshop and
Diagnostics Manuals for WG972 Gasoline Engines.
CAUTION
When testing electrical components for continu-
ity with a multimeter (ohms setting), make sure
that power to the circuit has been disconnected.
Ignition Switch
The ignition (key) switch has three positions (OFF, ON/
PREHEAT, and START). The terminals are marked as
shown. The circuitry of the ignition switch is shown in the
chart below. With the use of a multimeter (ohms setting),
the switch functions may be tested to determine whether
continuity exists between the various terminals for each
position. Verify continuity between switch terminals.
SWITCH
POSITION
NORMAL
CIRCUITS
OTHER
CIRCUITS
OFF NONE NONE
ON/PREHEAT B + A + I X + Y
START B + S + I NONE
Figure 10
A
Y
B
I
X
S
1. Switch
2. Key
3. Hex nut
4. Lock washer
Figure 11
2
3
1 4
Figure 12
45
°
45
°
ON/PREHEAT
START
OFF
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