Groundsmaster 4300--DPage 5 -- 28Electrical System
Joystick Raise and Lower Switches
Two( 2) microswitches for thejoystick are locatedon the
lift control that is attached to the control arm. The rear
switch on the control is used to lower (and engage) the
cutting decks and the front switch to raise ( and disen-
gage) them. These switches are used as inputs for the
TEC controller. A normally open contact in the switch
closes when the joystick is positioned to either lower or
raise the cutting decks. Each switch has an electrical
connector to make sure the normally closed contact on
the switch is not used. The raise switch has yellow/blue
and black harness wires connected to it and the lower
switch has orange and black harness wires connected
to it.
Testing
1. Before disconnecting the joystick switches for test-
ing, the switches andtheir circuit wiring shouldbe tested
as TEC controller inputs with the Diagnostic Display
(see Diagnostic Display in the Troubleshooting section
of this chapter).If theDiagnostic Displayverifies that the
joystick switches and circuit wiring are functioning cor-
rectly,no further switchtesting is necessary.If,however,
the Diagnostic Display determines that either joystick
switch and circuit wiring are not functioning correctly,
proceed with test procedure.
2. Remove control arm covers to gain access to joys-
tick switches (see Control Arm Disassembly in the Ser-
vice and Repairs section of Chapter 6 -- Chassis).
3. Make sure ignition switch is in the OFF position.
4. Disconnect wire harness electrical connector from
the raise or lower switch that is to be tested (Fig. 29).
5. Connect a multimeter (ohms setting) across the nor-
mally open (NO) and common terminals of the switch
(Fig. 30).
6. With the joystick in the neutral (center) position,
there should be no continuity (open) across the switch
terminals.
7. Move and hold the joystick to activate the switch be-
ing tested. There should be continuity (closed) across
the switch terminals.
8. If joystick switch is faulty, replace switch.
9. Ifthe joystick switchtests correctly anda circuitprob-
lem still exists, check wire harness (see Electrical Sche-
matic and Circuit Drawings in Chapter 8 -- Foldout
Drawings).
10.Connect wire harness electrical connector to the
joystick switch.
11.Install control arm covers to machine (see Control
Arm Assembly in the Service and Repairs section of
Chapter 6 -- Chassis).
1. Joystick
2. Lower switch
3. Raise switch
Figure 29
1
2
3
FRONT
1. NO terminal
2. Common terminal
3. NC terminal (not used)
4. Switch lever
Figure 30
1
3
2
4
