Traction Neutral Switch
The traction neutral switch is a normally open proximity
switch that closes when the traction pedal is in the neu-
tral position. The switch mounts to a bracket on the trac-
tion pump (Fig. 31). The sensing plate for the traction
neutralswitchisthetractionleverbracketthatissecured
to the pump control arm. The neutral switch is used as
an input for the TEC controller.
D. Turn ignition switch to the ON position (do not
start engine) and verify with a multimeter that ma-
chine wire harness connector terminal for pink wire
has system voltage (12 VDC) present.
E. If black wire is closed to ground, pink wire has
system voltage present and switch LED did not func-
tion, replace traction neutral switch. Adjust switch af-
ter installation (see Traction Neutral Switch in the
Adjustments section of this chapter).
Testing
1.
Before disconnecting the traction neutral switch for
testing, the switch and its circuit wiring should be tested
as a TEC controller input with the Diagnostic Display
(see Diagnostic Display in the Troubleshooting section
ofthischapter).IftheDiagnostic Displayverifies thatthe
traction neutral switch and circuit wiring are functioning
correctly, no further switch testing is necessary. If, how-
ever,theDiagnostic Display determines thatthetraction
neutral switch and circuit wiring are not functioning cor-
rectly, proceed with testing procedure.
5. If the neutral switch tests correctly and a circuit prob-
lem still exists, check wire harness (see Electrical Sche-
matic and Circuit Drawings in Chapter 8 -- Foldout
Drawings).
6.
to wire harness when testing is complete.
Make sure that traction neutral switch is connected
FRONT
3
5
2.
Turn ignition switch to the ON position (do not start
6
engine) and check LED on cable end of neutral switch
(Fig. 31). LED should be illuminated when the traction
pedal is in the neutral position.
4
3.
With the ignition switch still in the ON position (do not
startengine),presstractionpedaloutoftheneutralposi-
tion and check LED on cable end of neutral switch. LED
should not be illuminated when the traction pedal is
not in the neutral position.
2
6
1
4.
If the neutral switch LED did not function correctly:
5
A. Makesurethatneutralswitchisproperlyadjusted
(see Traction Neutral Switch inthe Adjustments sec-
tion of this chapter). If necessary, adjust switch and
return to step 2 above.
7
Figure 31
1.
2.
3.
4.
Traction pump
5.
Jam nut (2 used)
Lock washer (2 used)
Switch LED location
Traction neutral switch
Traction lever bracket
Pump control arm
6.
7.
B. Make sure ignition switch is OFF and disconnect
the traction neutral switch connector from the ma-
chine wire harness.
C. Verify that the machine wire harness connector
terminal for black wire is closed (continuity) to
ground.
Groundsmaster 4300--D
Page 5 -- 29
Electrical System
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