Component Testing; Component Testing; Ignition Switch - Toro Groundsmaster 3500 30807 Service Manual

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.

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 NORMAL
POSITION CIRCUITS
OFF
ON/PREHEAT
START
A
Y
B
S
I
Figure 10
Electrical System
OTHER
CIRCUITS
NONE NONE
B + A + I X + Y
B + S + I NONE
X
When testing electrical components for continu-
ity with a multimeter (ohms setting), make sure
that power to the circuit has been disconnected.
1
1. Switch
2. Key
Page 6 − 14
CAUTION
3
4
Figure 11
3. Hex nut
4. Lock washer
OFF
45 °
ON/PREHEAT
45 °
START
Figure 12
Groundsmaster 3500
2