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Groundsmaster 4500--D/4700--D Page 5 -- 17 Electrical System
Indicator Lights
Charge Indicator Light
Thechargeindicatorlightshouldcome onwhentheigni-
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-
tionswitch toON;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 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
2
).
Totesttheoilpressurelightandcircuitw iring,groundthe
green wire attached to oil pressure switch located on
right side of engine near the starter motor. Turn ignition
switchtoON;theoilpressure lightshouldilluminateindi-
cating correct operation of the electrical wiring to the oil
pressure switch.
High Temperature Warning Light
Ifthe enginecoolant temperaturerises toapproximately
220
o
F (105
o
C), the high temperature light should come
on and the PTO (cutting decks) will disengage.
To test the high temperature shutdown light and circuit
wiring, start the engine and ground the gray wire at-
tached to the temperature sender attached to water
flange on engine (see Temperature Sender in this sec-
tion). Warning 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 7 to
10 seconds while the ignition switch is left in ON.
Testing Indicator Lights
1. Apply 12 VDC to terminals 1A and 2A.
2. Ground terminals 1B and 2B.
3. Both indicator lights should light.
1. Charge indicator
2. Engine oil pressure
3. High temp indicator
4. Glow plug indicator
Figure 16
4
1
2
3
Figure 17
1. Charge indicator
2. Engine oil pressure
3. High temp shutdown
4. Glow plug indicator
5. Warning light back
1A (+)
2A (+)2B
1B
4
1
5
3
2
Electrical
System