Toro Greens Aerator, Service Manual

Page: 65 / 130

Component Testing
For accurate resistance and/or continuity checks, elec- NOTE: See the appropriate engine Repair Manual lo-
trically disconnect the component being tested from the cated after Chapter 3 for engine component testing in-
circuit (e.g. unplug the ignition switch connector before formation.
doing a continuity check).
NOTE: Electrical troubleshooting of any 12 Volt power
connection can be performed through voltage drop tests
without disconnecting the component.
CAUTION
ity with a multimeter (ohms setting), make sure
When testing electrical components for continu-
that power to the circuit has been disconnected.
Ignition Switch
The ignition (key) switch has three positions (OFF, RUN,
OFF
and START) (Fig. 4). The terminals are marked as
shown in Figure 5.
Testing
The circuitry of the ignition switch is shown in the chart
below. With the use of a multimeter (ohms setting), the
45
45
RUN
o
o
START
switch functions may be tested to determine whether
continuity exists between the various terminals for each
switch position.
Unplug wire harness connectors from switch and verify
continuity between switch terminals. Reconnect the har-
Figure 4
ness connectors to the switch after testing.
POSITION CIRCUIT
OFF G + M + A
RUN B + L + A
START B + L + S
G
L
B
S
M
A
Figure 5
SWITCH
HEX NUT
KEY
LOCK WASHER
Electrical
System
Figure 6
Greens Aerator
Page 5 – 7
Electrical System