Toro Groundmaster 31900, Service Manual

Page: 217 / 355

Glow Plug Switch (Model 31900, 31901, 31907 and 31909)
POSITION CLOSED
CIRCUITS
OFF 2 + 3, 5 + 6
ON 2 + 1, 5 + 4
The glow plug switch is located on the operator’s console. The glow relay and
the glow plugs are energized as long as the front of the switch is depressed.
Testing the Glow Plug Switch
1. Park the machine on a level surface, lower the cutting unit (or attachment),
engage the parking brake, set the key switch to the O
FF
position and remove
the key from the key switch.
2. Disconnect the battery negative (-) cable at the battery; refer to Removing
and Installing the Battery (page 6–64) .
3. Remove the operator’s console covers; refer to Removing and Installing the
Operator’s Console Covers (page 7–23) .
4. Disconnect the wire harness connector from the switch and remove the
switch from the console if necessary. Check the switch and the harness
connector for damage or corrosion and clean or repair if necessary.
5. Use a multimeter (ohms setting) and the preceding table to determine
whether continuity exists between the various terminals for each switch
position.
6. Replace the switch if necessary.
7. If the switch tests correctly and a circuit problem still exists, check the wire
harnesses; refer to Appendix A (page A–1) .
8. Install the switch and connect the wire harness after testing.
9. Install the console covers.
10. Connect the battery negative (-) cable at the battery.
Groundsmaster ® 3200, 3300 and 3310 Page 6–25 Electrical System: Testing the Electrical Components
19240SL Rev A