Service manual

Groundsmaster 3280−D/3320Page 6 − 18Electrical System

Seat Switch

The seat switch is normally open and closes when the

operator is on the seat. If the traction system or P.T.O.

switch is engaged when the operator raises out of the

seat, the engine will stop. The seat switch (Fig. 23) and

its electrical connector are located directly under the

seat. Testing of the switch can be done without seat re-

moval by disconnecting the seat wire from the machine

wiring harness.

The Standard Control Module monitors the operation of

the seat switch. If the ignition switch is in the ON position

and the seat is occupied, the Module in seat input LED

should be illuminated.

Testing

1. Make sure the engine is off. Locate switch for testing.

2. Disconnect electrical connector from 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. Standard seat switch

Figure 23