T1 611, 409D, blower not working

Hi guys, I’m preparing for a bigger trip and I found out that my blower doesn’t work. The fuse is ok, then I looked at the schematic and found out that there is a heating blower engine. Well, so far as logical. But I don’t find the part? Neither looked from above, nor from below. According to the schematic a black, a red and a brown wire (mass) should go to the blower engine, but as I said, no idea where the part is. That would be very helpful if one of you knew about it. Merci, Michael