Toro Groundsmaster 3280-D Service Manual page 279

Testing the Parking Brake Switch (continued)
Groundsmaster ® 3280-D/3320
05138SL Rev B
3. If the SCM verifies that the sensor and circuit wiring are functioning correctly,
then no more switch testing is necessary.
4. If the SCM determines that the parking brake switch and circuit wiring are not
functioning correctly, proceed with the test.
5. Remove the knob from the parking brake rod and the screws from the
steering tower cover
6. Slide the steering tower cover up the steering column.
7. Locate the parking brake switch
Note: Ensure that the parking brake is not set.
8. Disconnect the switch connector from the machine wire harness.
9. Connect a multimeter (ohms setting) across the switch connector terminals
to check the continuity of the switch as follows:
A. When the switch plunger is extended, there should not be continuity
between the switch terminals.
B. When the switch plunger is pressed, there should be continuity between
the switch terminals.
10. Replace the switch if testing determines that the switch is damaged.
11. If the parking brake switch testing is correct and a circuit problem still exists,
check the main wire harness; refer to the Electrical Schematics and Wire
Harness Drawings/Diagrams in
12. After you complete the parking brake switch testing, connect the switch
connector to the machine wire harness.
13. Install the steering tower cover and parking brake knob.
(Figure 149).
(Figure 150).
Appendix A (page
Page 6–51 Electrical System: Testing the Electrical Components
A–1).