Groundsmaster 4100--D/4110--D Page 5 -- 23 Electrical System
Warning Lights
Charge Indicator Light
Thechargeindicatorlightshouldcomeonwhentheigni-
tion switch is in ON with the engine not running or with
an improperly operating charging circuit while the en-
gine is running.
To test the charge indicator light and circuit wiring,
ground the white wire attached to alternator. Turn igni-
tionswitchtoON;thechargeindicatorlightshouldillumi-
nate indicating correct operation of the electrical wiring
to the alternator.
Engine Oil Pressure Light
The oil pressure light should come on when the ignition
switch is in the ON position with theengine not running.
Also,it should light withtheenginerunningif the engine
oil pressure drops below 7 PSI (0.5 kg/cm
2
).
Totesttheoilpressurelightandcircuitwiring,groundthe
green wire attached to oil pressure switch located on
right side of engine near the starter motor. Turn ignition
switchtoON;theoilpressurelightshouldilluminateindi-
cating correct operation of the electrical wiring to the oil
pressure switch.
High Temperature Warning Light
Iftheenginecoolanttemperaturerisestoapproximately
220
o
F (105
o
C), the high temperature light should come
on and the PTO (cutting deck) will disengage.
Totestthehightemperaturewarninglightandcircuitwir-
ing, start the engine and ground the gray wire attached
to the temperature sender attached to water flange on
engine(seeTemperatureSenderinthissection).Warn-
ing light should illuminate.
Glow Plug Indicator Light
The glow plug light should come on when the ignition
switch is placed in ON/PREHEAT prior to placing the
ignition switch in START. The light should stay lit for
approximately seven (7) s econds while the ignition
switch is left in ON.
Testing Warning Lights
1. Removecontrolarmcoverstogainaccesstoindica-
tor light and harness connectors (see Control Arm Dis-
assemblyintheServiceand RepairssectionofChapter
7 -- Chassis).
2. Locatetheindicatorlighttobetestedanddisconnect
the wire harness electrical connector from the light.
3. Apply 12 VDC to terminals 1A and 2A (Fig. 23).
4. Ground terminals 1B and 2B (Fig. 23).
5. Both indicator lights should illuminate.
6. Connect wire harness electrical connector to the in-
dicator light.
7. Install control arm cover to machine (see Control
Arm Assembly in the Service and Repairs section of
Chapter 7 -- Chassis).
1. Charge indicator
2. Engine oil pressure
3. High temp warning
4. Glow plug indicator
Figure 22
1
2
3
4
Figure 23
1. Charge indicator
2. Engine oil pressure
3. High temp shutdown
4. Glow plug indicator
5. Warning light back
1A (+)1B
2B 2A (+)
4
3
2
1
5
Electrical
System
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