Alarm 57 on mod 1 could also be set by the pantograph (scissor) harness. You can check this by going to the tilt and side shift solenoid and checking for continuity to the connector at the top of the fixed carriage. That harness is also individual wires in a sleeve that runs along the right side hose (looking through the mast forks first). Same deal as what Swoop says spray silicone lube to slide the wires through.

first thing is a serial number would help be more accurate in obtaining the known correct information
But based on your code i will assume this is the 36v truck.

A service bulletin was sent out about code 57
it states the following:

Alarm 57 occurs when operating the auxiliary hydraulic functions. All auxiliary hydraulic functions are disabled such as no reach, no retract, no sideshift, or no tilt when commanded by operator.

Cause: Broken wires or an open occurs somewhere in the auxiliary hydraulic electrical circuit.

Resolution:
Using the Zapi software program or Zapi handset, in SICOS turn OFF parameter "OPEN VALVE DIAG."
SICOS/CONFIG MENU/SET OPTIONS/OPEN VALVE DIAG

This will allow the auxiliary hydraulic circuit to function on trucks that do not have an open in the circuit.

If this does not correct the issue, the technician should look for an open in the circuit. Check/verify proper coil resistance. Check connector X41 to the mast and check resistance on the following pins: 1&2 = 13 ohms, 1&3 = 13 ohms, 1&4 = 16 ohms. For opens, start at the P-clamp located on the right side of the mast. Wires can rub against the clamp causing an open in the circuit. If there is not a negative (-) at the coils with the S/S button pressed in, you may have a broken wire in the handle.


Now these trucks have a tri hose/cable that runs through the center of the mast, 2 hoses on outside with a center sleeve for the harness to run through. The wires in the center sleeve were notorious for breaking causing problems like this. So if the above bulletin does not server to solve this problem i would check those wires in that harness. One plug is located on the left side of the truck behind a small access door and the other end is at the base of the carriage behind a small bracket that covers the plugs.

If this cable in the center of the mast hosing turns out to be the issue the complete hose assembly will have to be removed and the wires pulled out, it cannot be done in the truck. This is not a cable, it is individual wires ran through this sleeve. The best way to do it is to get the new harness and attach it to the old one and pull the old one out while pulling the new one in, use silicone spray on the wires so they will slide easier.
A pain in the butt to replace.

Hope this is helpful :o)
Good luck.