Hello all. I have a problem with forklift linde h14t 391 series. The problem is that after switching on the ignition and starting the engine, the fan does not rotate. The voltage on pin 1 is correct, the ground on pin 2 is also correct. The voltage on the 4 pin after turning on the ignition is correct. Continuity on the yellow and brown-blue wires to the lhc controller is correct. After connecting to the +1 and 4 pins and to the - pin 2, the fan rotates at maximum speed. Replaced: fan, coolant temperature sensor, lhc controller, ignition switch. The temperature on the computer is rising properly. Is there anything else I can check? Please help. I already run out of ideas.