Groundsmaster 4100−DPage 5 − 10Electrical System
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).
NOTE: For engine component testing information, see
the Kubota Workshop Manual, Diesel Engine, V2003−T
Series at the end of Chapter 3 − Kubota Diesel Engine.
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 circuit wiring of the ignition switch is shown
in the chart. 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.
POSITION
CIRCUIT
OFF NONE
ON / PREHEAT B + I + A, X + Y
START B + I + S
Figure 8
A
B
S
Y
X
I
Figure 9
1. Key
2. Hex nut
3. Lock washer
4. Ignition switch
3
1
2
4
Figure 10
45
°
45
°
ON / PREHEAT
START
OFF
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