Toro 30411, Service Manual

Page: 177 / 262

Groundsmaster 4100−D Page 5 − 23 Electrical System
Glow Controller
The glow controller is located under the console cover.
NOTE: Refer to Chapter 9 − Electrical Schematics and
Diagrams when troubleshooting the controller.
Controller Operation
1. When the ignition switch is placed in the ON position,
the controller energizes the glow plugs and illuminates
the glow indicator light for approximately 7 seconds.
2. When the ignition switch is held in the START posi-
tion, the glow plugs will energize and the glow indicator
light will not light.
3. When the ignition switch is released from START to
ON, the glow plugs will de−energize and the glow indica-
tor light will remain off.
Controller Checks
1. Make sure there is power from the battery.
2. Disconnect electrical connector to the engine run so-
lenoid to prevent the engine from starting.
3. Place ignition switch in the ON position. Verify the fol-
lowing while in the ON position:
A. Glow indicator light is on.
B. Glow relay is energized.
C. Glow plugs are energized.
D. Glow indicator light goes out and glow plugs de−
energize after 7 seconds.
4. Place ignition switch in the START position. Verify
the following while in the START position:
A. Glow indicator light is out.
B. Glow relay is energized.
C. Glow plugs are energized.
D. Power exists to terminal 1 of the glow controller.
NOTE: If there is no power to terminal 1 of the glow con-
troller, verify continuity of the circuitry from the ignition
switch to the controller and perform step 4 again (see
Chapter 9 − Electrical Schematics and Diagrams).
1. Glow controller end view
2. Controller top view 3. Controller side view
Figure 35
3
2
1
6
4
5
3
1
2
5. If any of the conditions in step 3 are not met or power
to terminal 1 exists and any of the other conditions in
step 4 are not met:
A. Verify continuity of the circuitry from the battery to
the glow relay and glow plugs (see Chapter 9 − Elec-
trical Schematics and Diagrams).
B. Verify continuity of the circuitry from the battery to
ignition switch, glow controller, glow indicator light,
glow relay, and ground (see Chapter 9 − Electrical
Schematics and Diagrams).
C. Replace components as necessary.
6. Reconnect electrical connector to the run solenoid.
Electrical
System