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Groundsmaster 4500--D/4700--DPage 5 -- 22Electrical System
Seat Switch
The s eat switch is normally open and closes when the
operator ison theseat. The seatswitch andits electrical
connector are located in the seat assembly. If the trac-
tionsystemorPTOswitchisengagedwhentheoperator
raises out of the seat, the engine willstop. Testing of the
switch canbe donewithout seatremoval bydisconnect-
ing the switch wire from the machine wire harness (Fig.
27).
Testing
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
thattheseat switchandcircuit wiringare notfunctioning
correctly, proceed with test.
2. Make sure ignition switch is OFF. Remove key from
ignition switch.
3. Disconnect seat switch connector from the machine
wire harness connector.
4. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the seat switch con-
nector terminals.
5. With no pressure on the seat, there should be no
continuity between the seat switch terminals.
6. Press directly onto the seat switch through the seat
cushion. There should be continuityas the seat cushion
approaches the bottom of its travel.
7. If testing determines that seat switch is faulty, re-
placeseat switch(see OperatorSeat Servicein the Ser-
vice and Repairs section of C hapter 7 -- Chassis).
8. Connect seat switch connector to wire harness con-
nector a fter testing is c omplete.
1. Wire harness connector 2. Seat switch connector
Figure 27
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