Hello together. Unfortunately, the radiator fan doesn’t start if it should do it…. First diagnosis, the fan itself is defective. Tested with direct power supply. It really didn’t jump on. Okay, exchanged for a used one, which also starts with direct power supply. To be careful, the relay is changed times. Unfortunately, everything is without success. The workshop has determined today 1,5h everything imaginable measured and tried, but it does not jump and the engine is too hot and the climate does not work in the stand. Apparently, the middle plug (which comes into the relay) does not have power. This is the plug, which has a yellow and a yellow/white cable. Someone’s idea what I / we could / should do next?! These two cables go into MStg or? fuses are also all ok….