Indicator Lights - Toro Groundsmaster 4500-D Service Manual

Indicator Lights

Testing Indicator Lights
1. Apply 12 VDC to terminals 1A and 2A.
2. Ground terminals 1B and 2B.
3. Both indicator lights should light.
Engine Oil Pressure Light
The oil pressure light should come on when the ignition
switch is in the ON position with the engine not running.
Also, it should light with the engine running if the engine
oil pressure drops below 7 PSI (0.5 kg/cm
To test the oil pressure light and circuit wiring, ground the
green wire attached to oil pressure switch located on
right side of engine near the starter motor. Turn ignition
switch to ON; the oil pressure light should come on indi-
cating correct operation of the electrical wiring to the oil
pressure switch.
High Temperature Shutdown Light
If the engine coolant temperature rises to 230
o
(110 C), the high temperature light should come on as
the high temperature shutdown switch stops the engine.
To test the high temperature shutdown light and circuit
wiring, start the engine and ground the blue/white wire
attached to high temperature shutdown switch on fly-
wheel end of engine (see High Temperature Shutdown
Switch in this Chapter). Warning light should illuminate
and engine should stop running.
Glow Plug Indicator Light
The glow plug light should come on when the ignition
switch is placed in ON prior to placing the ignition switch
in START. The light should stay lit for 7 to 10 seconds
while the ignition switch is left in ON.
Charge Indicator Light
The charge indicator light should come on when the igni-
tion switch is in ON with the engine not running, or with
an improperly operating charging circuit while the en-
gine is running.
Groundsmaster 4500--D/4700--D
3
4
).
2
o
F
1. Charge indicator
2. Engine oil pressure
3
4
1. Charge indicator
2. Engine oil pressure
3. High temp shutdown
Page 5 - - 9
2
1
Figure 8
3. High temp shutdown
4. Glow plug indicator
5
6
1B 1A (+)
2B 2A (+)
Figure 9
4. Glow plug indicator
5. Warning light front
6. Warning light back
Electrical System (Rev. A)
2
1