Did you update software which has to be done, and then settings all changed, as far as I know there is no forks home switch option on Rr5700 only RM600, which is the same download

Need info about fork home switch option. Went into display and noticed it enabled. Switch continuity and wiring ok. Could this be a software problem?

Problem resolved. Had bad access 4

Has this been resolved? The right pedal is for hydraulic and presence. The left pedal is brake actuation. The pedals must be cycled before the lift will travel. The lift may be seeing the right pedal cycle but not the left. There may be a switch sticking or wire broke under the floor board however, the multifunction handle may be out of calibration as well. If the truck sees the potentiometer/ forward, reverse, requesting travel it will tell you to cycle pedals left and right before centering handle for travel. Check pedal switches and handle is centered. Multifunction handle may be worn and pot out of calibration.

There might be a switch or presence sensor for the Left pedal that has its circuit closed when it needs to be open.

You'll have to remove the Floor Board and take a look at the underside linkage and wires.