JLG 400SJ Operation And Safety Manual page 39

WHEN THE MACHINE IS SHUT DOWN THE MASTER/EMERGENCY STOP
SWITCH MUST BE POSITIONED TO THE OFF POSITION TO PREVENT
DRAINING THE BATTERY.
4. Power/Emergency Stop Switch.
A two-position red mushroom shaped switch supplies
power to PLATFORM/GROUND SELECT switch when
pulled out (on). When pushed in (off), power is shut off
to the PLATFORM/GROUND SELECT switch.
NOTE: When Power/Emergency Stop switch is in the on
position and engine is not running, an alarm will
sound, indicating Ignition is on.
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SECTION 3 - MACHINE CONTROLS AND INDICATORS
5. Engine Start/Auxiliary Power Switch
Engine Start/ Auxiliary Power Switch /Function Enable.
NOTE: Auxiliary power only works if there is no oil pressure,
and is disabled if engine is running.
– JLG Lift –
or
To start the engine, the switch must be held
"UP" until the engine starts.
To use auxiliary power, the switch must be
held "DOWN" for duration of auxiliary pump
use. Aux power can only be used if the engine
is not running.
If equipped, the enable switch must be held
"DOWN" to enable all boom controls when the
engine is running.
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