Component Testing; Component Testing; Ignition Switch; Hour Meter - Toro Greensmaster 3150 Service Manual

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).

Ignition Switch

The ignition (key) switch has three positions (OFF, RUN,
and START). The terminals are marked as shown. The
circuitry of the ignition switch is shown in the chart. With
the use of a multimeter (ohms setting), the switch func-
tions may be tested to determine whether continuity ex-
ists between the various terminals for each position.
Verify continuity between switch terminals.
POSITION
OFF NONE
RUN B + I + A, X + Y
START B + I + S

Hour Meter

1. Connect the positive (+) terminal of a 12 VDC
source to the positive terminal of the hour meter.
2. Connect the negative (–) terminal of the voltage
source to the other terminal of the hour meter.
3. The hour meter should move a 1/10 of an hour in six
minutes.
4. Disconnect the voltage source from the hour meter.
Greensmaster 3150
CIRCUIT
Page 5 – 9
CAUTION
When testing electrical components for continu-
ity with a multimeter (ohms setting), make sure
that power to the circuit has been disconnected.
A
B
S
I
HEX NUT
SWITCH
LOCK WASHER
Figure 6
Figure 7
Y
X
KEY
Electrical System