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Groundsmaster 4000−D Page 5 − 13 Electrical System
Seat Switch
The seat switch is normally open and closes when the
operator is on the seat. If the traction system or PTO
switch is engaged when the operator raises out of the
seat, the engine will stop. The seat switch and its electri-
cal connector are located directly under the seat. Test-
ing of the switch can be done without seat removal by
disconnecting the seat wire from the machine wiring
harness.
1. Make sure the engine is off.
2. Disconnect electrical connector for the seat switch.
3. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the connector termi-
nals.
4. With no pressure on the seat, there should be no
continuity between the seat switch terminals.
5. Press directly onto the seat switch through the seat
cushion. There should be continuity as the seat cushion
approaches the bottom of its travel.
6. Reconnect switch connector.
1. Electrical connector 2. Seat switch
Figure 16
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Parking Brake Switch
The switch used for the parking brake is a normally
closed switch. The parking brake switch is located under
the steering tower cover and opens when the parking
brake lever is engaged.
1. Make sure the engine is off. Locate switch for testing.
2. Disconnect electrical connector from the switch.
3. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the connector termi-
nals.
4. When the switch plunger is extended there should be
continuity between the switch terminals.
5. When the switch plunger is depressed, there should
be no continuity between the switch terminals.
6. Reconnect switch connector.
1. Parking brake switch
2. Parking brake rod
3. Parking brake pawl
Figure 17
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Electrical
System