Component Testing; Component Testing; Ignition Switch; Fuse Block - 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 on the switch).

Ignition Switch

The ignition (key) switch has three (3) positions (OFF,
RUN and START). The terminals are marked as shown
in Figure 9. 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 termi-
nals.
POSITION
OFF
RUN
START

Fuse Block

Fuses can be removed to check continuity. Use a multi-
meter to make sure that fuse resistance is less than 1
ohm.
Fuses supply power to the following (Fig. 10):
1. The 20 amp fuse (F1) supplies power to engine run
circuits and also to the hydraulic solenoid coils.
2. The 10 amp fuse (F2) supplies power to the light/test
switch and the optional light circuit.
3. The 10 amp fuse (F3) supplies power to the engine
run circuits and also to the hydraulic solenoid coils.
4. The 10 amp fuse (F4) supplies power to leak detec-
tor solenoid and the cutting unit control circuits.
Electrical System
CIRCUIT
NONE
B + I + A, X + Y
B + I + S
When testing electrical components for continu-
ity with a multimeter (ohms setting), make sure
that power to the circuit has been disconnected.
F4 F3
Page 5 - - 12
CAUTION
A
B
Y
S
X
I
Figure 9
F2 F1
Figure 10
Greensmaster 3150