JLG 1500SJ Operator Manual - Manual (Page 133)

SECTION 5 - LCD DISPLAY PANEL - GENERATION 1 & 2
3121261 – JLG Lift – 5-37
KeySwitch In Ground Mode:
If the keyswitch is set to ground mode, the display shows the Key
Switch in Ground Mode Image.
Figure 5-24. Keyswitch In Ground Mode Screen