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Groundsmaster 4000--D/4010--D Page 5 -- 43 Electrical System
Turn Signal Switch (Groundsmaster 4010--D)
On Groundsmaster 4010--D machines, the turn signal
switch is used as an input for the TEC controller to pro-
vide power for the turn signals. The switch is located on
the steering tower (Fig. 50).
Testing
1. Before disconnecting the turn signal switch for test-
ing, the switch and its circuit wiring should be tested as
a TEC input with the InfoCenter Display (see InfoCenter
Display inthis chapter).If the InfoCenter verifiest hat the
turn signal switch and circuit wiring are functioning cor-
rectly, no furtherswitch testing isnecessary.If, however,
the InfoCenter determines that the turn signal switch
and circuit wiring are not functioning correctly, proceed
with test.
2. Make sure ignition s witch is OFF. Remove key from
ignition switch.
3. Remove front steering tower cover (see Steering
Tower in the Service and Repairs section of Chapter 7
-- Chassis).
4. Locate turn signal switch and unplug wire harness
connector from switch.
5. The switch terminals are marked as shown in Figure
51. The circuit logic of the turn signal switch is shown in
the chart below. With the use of a multimeter (ohms set-
ting), the switch functions may be tested to determine
whether continuity exists between the various terminals
foreach position. Verifycontinuity between switch termi-
nals. Replace turn signal switch if testing identifies a
faulty switch.
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
RIGHT
TURN
2+3
5+6
2+1
5+4
NEUTRAL NONE ALL
LEFT
TURN
2+1
5+4
2+3
5+6
6. Connect the harness connector to the switch after
testing.
7. 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).
8. Installfront steering towercover(see Steering Tower
in the Service and Repairs section of Chapter 7 -- Chas-
sis).
1. Steering column 2. Turn signal switch
Figure 50
1
2
Figure 51
BACK OF SWITCH
Electrical
System