Indicator Lights and Gauges
Diagnostic Lamp
The diagnostic lamp should come on when the ignition
key sw
itch is turned to the
RUN position. If the lamp is
ON, it indicates that the electronic control unit (ECU) is
functioning normally. If this lamp is OFF, it indicates a
lack of power to the ECU, or a disconnected loop-back
connector. If this lamp is flashing ON and OFF, it indi-
cates an output fault. If controller diagnostic lamp is
flashing, immediately connect the diagnostic display
(without turning off the key switch) and push input-out-
put toggle switch on diagnostic display tool so “OUT-
PUTS DISPLAYED
” LED is on. The flashing LED on the
diagnostic display will indicate which output is faulted.
Test the lamp by disconnecting the wires and applying
12 V.D.C. between the lamp wiring terminals.
Reel Speed Light
The reel speed light should come ON when the cutting
units are operating with the machine not moving. When
the light is ON, it indicates that the machine is being
operated in a way in which the automatic reel speed
control cannot obtain the desired clip.
Test the lamp by disconnecting the wires and applying
12 V.D.C. between the lamp wiring terminals.
Oil Pressure Light
Oil pressure lamp should come on when the ignition key
switch is in the RUN position with the engine not running
or if the oil pressure switch closes during operation - oil
pressure below 7 psi (0.5 kg/cm
2
).
Test the lamp by disconnecting the wires and applyi
ng
12 V.D.C. between the lamp wiring terminals.
Amp Light
The amp light should come on when the ignition key
switch is in the
RUN position with the engine not running
or if the charging circuit is not operating properly during
operation.
Test the lamp by disconnecting the wires and applying
12 V
.D.C. between the lamp wiring terminals.
Glow Light
The glow
light should be on when the glow switch is ON
or the ignition key switch is in the START position.
Test the lamp by disconnecting the wires and applying
12 V
.D.C. between the lamp wiring terminals.
Temperature Light
The temperature light should come on only if the high
temperature shut-down switch and relay has stopped
the engine - coolant temperature above 225
o
F (108
o
C).
Test the lamp by grounding the
wire that is connected
to the high temperature shut-down switch (Fig. 14). The
light should come on when the wire is grounded.
Hourmeter
Test the hourmeter by connecting a 12 volt battery so
the positive (+) battery terminal is connected to the
positive terminal on the hourmeter. Connect the nega-
tive (–) battery terminal to the negative (–) terminal on
the alternator. The hourmeter should operate as
12 V.D.C. is applied between the terminals.
Temperature Gauge, Fuel Level Gauge
and Speedo
meter
To test a gauge,
use a commercial gauge tester. If a
commercial gauge tester is not available, substitute a
new gauge or test the sending unit.
Reelmaster
®
5100-D Page 5 - 25 Testing
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