IS this a single motor system?
Which side is not working.....slave side (opposite where motor is) of Drive side (where motor is)?
Slave side...check if cross tube that connects the 2 sides moves when operating motor.
YES it does.then check slave side for broken shear bolt (connects cross tube to slave drive)....just replace it with any 1/4 bolt
NO it does not..then check drive side for broken shear bolt
Drive side not moving....
Probably shear pin inside for helix gear/drive assembly
Have to dissassembly to repair
Are you in a CG?
YES....ask for HELP
Get wood blocks etc and couple jacks
Lift front of trailer using block cribbing and jacks to hookup to truck
Good Luck!