JLG 450A II Series Operation And Safety Manual page 41

5. Engine Malfunction Indicator
The light indicates that the JLG Control System has
detected a malfunction and a Diagnostic Trouble Code
has been set in the system memory. Refer to the Service
Manual for instructions concerning the trouble codes
and trouble code retrieval.
The malfunction indicator light will illuminate for 2-3 sec-
onds when the key is positioned to the on position to act
as a self test.
6. Low Fuel Level Indicator
Indicates that the fuel level is 1/8 full or less. Illuminates
when there are approximately four gallons of fuel
remaining.
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SECTION 3 - MACHINE CONTROLS AND INDICATORS
7. Glow Plug Wait Indicator
Indicates the glow plugs are on. The glow plugs are
automatically turned on with the ignition circuit and
remain on for approximately seven seconds. Start the
engine only after the light goes out.
8. Overload Indicator. (If Equipped)
Indicates the platform has been overloaded.
9. Engine Air Filter Indicator
Indicates that the air filter is too restrictive and needs to
be replaced.
– JLG Lift – 3-7