Hi everyone!

We have Linde H120D forklift (2007 year). S/n E1X354U00044.

A couple of days ago, the forklift completely lost control, the instruments went out, and the engine stalled.
It turned out the ignition fuse had blown.
We replaced it (5A), and everything worked again. Three or four minutes later, the fuse blew again. We replaced it again and installed a 7.5A one. Now the instruments and display work, but the forklift won't start.

We don't have a diagnostic computer to check what's wrong.

We loosened the nuts on the fuel supply lines (Perkins 1106 engine with an electronically controlled high-pressure fuel pump, not a common rail). It's clear that diesel fuel is reaching the injectors, but it seems there's not enough pressure, as there's no smoke when turning the starter.

We checked the power supply to the ECM-it's there, and it's reaching the high-pressure fuel pump. Does anyone know what the problem could be? Some sensor that signals the pump or something else.

I have attached a diagram of the fuses and relays, as well as an information plate.