Hi--Lo Speed Switch
The hi--lo speed switch is used as an input for the
TEC--5001 controller to set the machine traction speed
for high speed range (transport) or low speed range
(mow). To change speed range settings with the speed
switch, the machine must be stopped or moving very
slowly. The hi--lo speed switch is located on the steering
tower (Fig. 77).
1
Testing
2
1.
Before disconnecting the mow/transport switch for
testing, the switch and its circuit wiring should be tested
as aTECcontroller inputwith theInfo Center Diagnostic
Display (see Info Center Display in this section).
2.
port switch and circuit wiring are functioning correctly,
If the Diagnostic Display verifies that the mow/trans-
Figure 77
2.
no further switch testing is necessary.
1.
Steering tower
Hi--Lo speed switch
3.
transport switch and circuit wiring are not functioning
If the Diagnostic Display determines that the mow/
4
1
5
2
6
correctly, test mow/transport switch.
4.
Make sure ignition switch is OFF. Remove key from
ignition switch.
5.
Remove front steering tower cover (see Steering
Tower Disassembly in the Service and Repairs section
of Chapter 7 -- Chassis). Locate mow/transport switch
and unplug wire harness connector from switch.
3
BACK OF SWITCH
6.
78.
The switch terminals are marked as shown in Figure
The circuit logic of the mow/transport switch is
Figure 78
showninthecharttotheright.Withtheuseofamultime-
ter (ohms setting), the switch functions may be tested to
determine whether continuity exists between the vari-
ous terminals for each position. Verify continuity be-
tween switch terminals. Replace switch if testing
identifies a faulty switch.
SWITCH
CLOSED
OPEN
POSITION
CIRCUITS
CIRCUITS
MOW
SPEED
2 + 3
5 + 6
2 + 1
5 + 4
NEUTRAL
NONE
ALL
7.
Connect the harness connector to the switch after
testing.
TRANSPORT
SPEED
2 + 1
5 + 4
2 + 3
5 + 6
8.
If switch tests correctly and circuit problem still ex-
ists, check wire harness (see Electrical Schematics and
Wire Harness Drawings in Chapter 10 -- Foldout Draw-
ings).
9.
Installfrontsteeringtowercover(seeSteeringTower
Assembly in the Service and Repairs section ofChapter
-- Chassis).
7
Groundsmaster 5900/5910
Page 5 -- 43
Electrical System
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