Seat Switch
The seat switch is normally open and closes when the
operator is on the seat. The seat switch and its electrical
connector are located in the seat assembly. If the trac-
tionsystemorPTOswitchisengagedwhentheoperator
raises out of the seat, the engine will stop. Testing of the
switch can be done without seat removal by disconnect-
ing the switch wire from the machine wire harness (Fig.
27).
1
Testing
2
1.
Before disconnecting the seat switch for testing, the
switch and its circuit wiring should be tested as a TEC
input with the Diagnostic Display (see Diagnostic Dis-
playintheTroubleshootingsectionofthischapter).Ifthe
Diagnostic Display verifies that the seat switch and cir-
cuit wiring are functioning correctly, no further switch
testingisnecessary.If,however,theDisplaydetermines
thattheseatswitchandcircuitwiringarenotfunctioning
correctly, proceed with test.
Figure 27
1.
Wire harness connector
2. Seat switch connector
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 be no
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 -- 22
Groundsmaster 4500--D/4700--D
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