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Neutral Switch
The neutral switch is a normally open proximity switch
that closes when the traction pedal is in the neutral posi-
tion. The neutral switch is located under the floor plate
(Fig. 33).
The TEC controller monitors the position of the neutral
switch (open or closed). Using inputs from the neutral
switch and other switches in the interlock system, the
TEC controller controls the energizing of the engine
start relay, and the fuel stop solenoid and fuel pump (see
Table 3: Input Conditions Required to Illuminate Dia-
gnostic Display Outputs in this chapter).
Testing
1. Park machine on level surface, lower cutting units,
stop engine, apply parking brake and remove key from
ignition switch.
2. Make sure the neutral switch is properly adjusted
(see Neutral Switch in the Adjustments section of this
chapter).
3. Before disconnecting the switch for testing, the
switch and its circuit wiring should be tested as a TEC
electrical input using the Diagnostic Display (see Diag-
nostic Display in this chapter). If input testing verifies
that the switch and circuit wiring are functioning correct-
ly, no further switch testing is necessary. If, however, in-
put testing determines that the switch and circuit wiring
are not functioning correctly, proceed with the following
switch testing procedure.
4. Make sure ignition switch is in the OFF position. Dis-
connect electrical connector from the neutral switch.
5. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the connector termi-
nals.
6. With the traction pedal in the neutral position, there
should be continuity between the two (2) switch leads.
7. Slowly depress the traction pedal. The continuity tes-
ter should show no continuity as the pedal is moved to
the full forward or full reverse direction.
8. Replace and readjust the switch if necessary.
9. Reconnect switch after testing.
Reelmaster 3550−D/3555−D/3575−D
2
1
1. Neutral switch
2. Floor plate
Page 5 − 31
3
Figure 33
3. Switch bracket
Electrical System
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