Seat Switch
The seat switch is normally open and closes when the
operator is on the seat. This switch is used as an input
for the TEC--5002 controller. The seat switch and its
electrical connector are located in the seat assembly. If
the traction system or PTO switch is engaged when the
operator raises outoftheseat,theenginewillstop.Test-
ing of the switch can be done without seat removal by
disconnecting the switch wire from the machine wire
harness (Fig. 31).
2
Testing
1
1.
Before disconnecting the seat switch for testing, the
switch and its circuit wiring should be tested as a
TEC--5002 input with the Diagnostic Display (see Diag-
nostic Display in the Troubleshooting section of this
chapter). If the Diagnostic Display verifies that the seat
switch andcircuit wiring arefunctioning correctly,nofur-
ther switch testing is necessary. If, however, the Display
determinesthattheseatswitchandcircuitwiringarenot
functioning correctly, proceed with test.
Figure 31
1.
2.
Seat switch electrical connector
Operator seat
2.
Make sure ignition switch is OFF. Remove key from
ignition switch.
3.
Disconnect seat switch connector from the machine
wire harness connector.
4.
multimeter (ohms setting) across the seat switch con-
nector terminals.
Check the continuity of the switch by connecting a
5.
continuity between the seat switch terminals.
With no pressure on the seat, there should not be
6.
cushion. There should be continuity as the seat cushion
approaches the bottom of its travel.
Press directly onto the seat switch through the seat
7.
place seatswitch (see Operator Seat Service intheSer-
vice and Repairs section of Chapter 7 -- Chassis).
If testing determines that seat switch is faulty, re-
8.
Connect seat switch connector to wire harness con-
nector after testing is complete.
Electrical System
Page 5 -- 28
Groundsmaster 4000--D/4010--D
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