sounds like a fault to me
possibly may have a function to override the 'off-wire' lift cutout
a button on the console maybe?
generally the ecu controls this automatically
when 'on-wire' all lift functions are normal
when you drive off wire it should switch to manual mode

you will probably need the service book on the truck and wire guidance control i'm pretty sure to figure this one out ;o)

could be a fault but could also be a programming condition
do you have handset and passwords