Seat Switch; Parking Brake Switch - Toro Groundsmaster 4100-D Service Manual

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 (Fig.
21). Testing of the switch can be done without seat re-
moval by disconnecting the seat wire from the machine
wiring harness.
Testing
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.

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 (Fig. 22) and opens when the
parking brake lever is engaged.
Testing
1. Make sure the engine is off. Locate brake 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.
Groundsmaster 4100−D
1. Electrical connector
1
1. Parking brake switch
2. Parking brake rod
Page 5 − 15
1
2
Figure 21
2. Seat switch
2
3
Figure 22
3. Parking brake pawl
Electrical System