Toro Groundsmaster 328-D, Service Manual

Page: 186 / 402

Groundsmaster 300 Series
Page 6A – 4
Electrical System (Rev. G)
Component Testing
Note: See Chapter 6 – Electrical System for additional
component identification and testing information. Only
new information for Groundsmaster 345 machines with
serial numbers above 21000000 and Groundsmaster
328–D machines is provided in this Chapter.
Seat Switch
The seat switch is normally open and closes when the
operator is on the seat. The switch is located directly un-
der the seat (Fig. 3).
1. Make sure the engine and ignition switch are Off. Re-
move key from ignition switch.
2. Tilt operator seat up. Disconnect machine wire har-
ness connector from seat switch.
3. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the switch connector
terminals.
4. With no pressure on the seat cushion, there should be
no continuity between the switch terminals.
5. Press directly onto the seat switch through the seat
cushion. There should be continuity as the seat cushion
approaches the bottom of its travel.
6. Connect machine wire harness connector to seat
switch.
If switch removal is necessary, remove seat with sliders
from seat plate. Remove switch from bottom of seat.
1. Seat
2. Seat plate
3. Screw (2 used)
4. Seat switch
5. Switch harness
Figure 3
2
3
1
4
High Temperature Override Switch
The high temperature override switch is located on the
control console.
The switch terminals are marked as shown in Figure 4.
The circuitry of the 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
POSITION
NORMAL
CIRCUITS
OTHER
CIRCUITS
ON 2 + 3 5 + 6
OFF 1 + 2 4 + 5
Figure 4
BACK OF SWITCH