Hi!
I have a strange problem with the OPS system. When he gets up from the driver's seat, the forklift's hydraulics are disengaged, but the forklift can still be driven. The orange light from the OPS system is off and the bulb is working. I looked a little in the wiring and found something like this:
http://img4.imagetitan.com/img.php?image=25_img_0182.jpg
http://img4.imagetitan.com/img.php?image=25_img_0181.jpg

A blue cable is connected to this cube that comes from the solenoid valve from the gearbox. Does anyone know what it is and is it an original item?