JLG 1500SJ Service Manual - Manual (Page 257)

SECTION 4 - BOOM & PLATFORM
3121262 – JLG Lift – 4-11
To enable the override mode 58237 must be entered as
the code. When the code is entered, the screen will show:
Use the Left or Right arrow key until you see:
Press Enter . Once Enter is pressed using the
Up or Down arrow key will turn the boom
recovery on or off. Once turned on, main boom lift down
will be enabled and main telescope in will be enabled to
recover the boom. After the boom is brought down it will
be trapped into transport. Reset or turning it off is
achieved by escaping out of the service mode, by cycling
power to the machine, or re-entering the service mode
and manually turning it off.