GROVE Published 10-21-2010, Control# 198-04 3-5
5540F/YB5515 SERVICE MANUAL ELECTRIC SYSTEM
and the ignition switch. If voltage was indicated, go to
step 4.
4. Turn the ignition switch to the START position and check
voltage at the start terminal. If no voltage, replace the
switch. Go to step 5 if voltage is indicated.
5. Have someone hold the key switch in the START
position, check for voltage at wires 21 and 21A on the
neutral start relay located under the instrument panel.
Make sure the travel select lever is in the NEUTRAL
position. If there is no voltage at wire 21, check the wire
to the ignition switch. If there is voltage at wire 21 and no
voltage at wire 21A, replace the relay. If voltage is
indicated at the relay wire 21A, go to step 6.
6. With the ignition switch in the START position, check for
voltage at the switch “S” terminal of the starter solenoid.
If there is no voltage, the problem is in the wire from the
neutral start relay to the starter solenoid. Repair or
replace the wiring. If voltage is indicated, the problem is
in the starter solenoid.
INSTRUMENT AND LIGHT CIRCUITS
General
Power is available to the light switch from a 20 amp fuse on
the fuse block. The light switch has three positions. The
upper position illuminates the work lights, head lights, tail
lights, gauge lights and the instrument panel light. The center
position turns all lights off. The lower position illuminates the
head and tail lights, as well as, the instrument panel lights.
Light Bulbs
Table 3-3
Light Bulbs
Gauges
The gauges are 12 volt components. Power is available to
the gauges through a 15 amp fuse when the ignition switch is
in the ON position.
Fuel Gauge
The fuel gauge connects to a sending unit in the fuel tank.
This sending unit puts a variable resistance in the circuit and
causes a corresponding indication on the fuel gauge,
representing fuel level.
Engine Oil Pressure Gauge
This gauge connects to a sending unit in the engine
lubrication system. The sending unit causes a variable
resistance which gives a corresponding indication on the
gauge, indicating engine oil pressure.
Engine Temperature Gauge
This gauge is connected to a sending unit in the engine
cooling system. The variable resistance caused by the
sending unit gives a corresponding indication of the
temperature of the engine coolant.
Voltmeter
The voltmeter is installed connected in parallel with the
charging circuit. The voltmeter gives an indication of
electrical charging system problems that can not be seen
with an ammeter.
Normally, when the engine is stopped (ignition switch in the
ON position) or when the engine is running at low idle, the
voltmeter will indicate 11-14 volts. When the engine is
running above low idle, the voltmeter will normally indicate
14-16 volts. More than 16 volts indicates an overcharging
condition Table 3-4.
Location Part No. Trade No.
Panel Lights 71421 T-61
Head Lights -- 4411 Sealed
Tail Lights -- 1157
Turn Signal -- 1156
Work Lights -- 4411 Sealed
Mast Lights -- 4411 Sealed
Reference Only
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