The unit turns on fine, the key activates the test phase, power steering turns on, all signs are good, make sure the gates are down, step on the pedal, a wrench appears on the screen, try to move fwd or rev, and/or lift, and the pedal signal appears. No travel or hydraulic functions. I replaced the pedal switch, no change. Upon stepping on the pedal you can hear a contractor close and then trip open. Any ideas!