Seat Switch; Parking Brake Switch - Toro Groundsmaster
4000?D Service Manual

PRELIMINARY – For Toro Distributor and Toro Company use only.

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 wire harness 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. Connect seat switch to harness connector after test-
ing is complete.

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 applied.
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.
Electrical System
1. Electrical connector
1
1. Parking brake switch
2. Parking brake rod
Page 5 − 14
1
2
Figure 18
2. Seat switch
2
3
Figure 19
3. Parking brake pawl
Groundsmaster 4000−D