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SECTION 2 - OPERATION
2-84
Electrical System High/Low Voltage
The Electronic Instrument Control System will
notify the operator that the electrical system of
the tractor is operatingat a voltage too high or too
low for normal operation.The following operating
conditions will cause the voltage warning system
to actuate:
A. The tractor running and more than 15 volts i s
measured in the electrical system.
B. The tractor running above 1500 RPM and less
than 12.5 volts is measured in the electrical
system.
C. The tractor runningat any speed and less than
11.5 volts is measured in the electrical
system.
See “Electrical System Troubleshooting” in
Section 4 for the proper steps to follow to find a
possible electrical system high/low voltage
problem. Failure to correct this problem may
cause damage to the electrical system. The
following description details the reaction of the
electronic monitor and audible alarm in the event
of electrical system high/low voltage:
With the engine running and any of the above
three conditions existing in the electrical system,
the lower portion of the monitor will flash
“VOLTS” along with the numerical value of the
electrical system voltage. The audible alarm will
sound a steady tone for four seconds. Even if the
rotary select switch is not in the electrical system
voltage position, the lower portion of the monitor
will still revert to the “VOLTS” display. The upper
portion of the monitor will continue to display
engine speed. The alternator output warning
light on the warning light bar will not illuminate.
The electronic monitor is not tied in specifically to
alternator output. It is reading total electrical
system voltage. The warning light is dedicated to
alternator output and will only illuminate if the
alternator stops charging.
Figure 2-113