Hello , I hope I’m in the right part of the forum, I would like to contact the Lima and electrics experts. I have today developed a Bosch LiMa for testing and clamped it into a vice for the test setup. I had previously cleaned all the contacts and removed the windings with Caramba brake cleaner from oxide and corrosion. I always checked with the beeper of the multimeter whether the contacts have connected again. So the controller again in d test lamp on D+ from the controller (two small pins, one probably without function?) and B+ from the Lima on B+ from the battery and B- from the battery on the vice by bridge cable. test lamp also lit. now I turned the Lima by drilling machine and wanted to see what happened. At a certain speed the test lamp then went out, that should usually mean that the LiMA starts to generate power, but when I started the drill from the test lamp did not work anymore and I can no longer get a signal with the through-checker when I hold the D+ pins of the controller and the pathogen contacts or the connection to the small screw. Can it be that due to the vibration of the drilling machine the crocodile clamp has come to both pins at the D+ connector and has caused such a short circuit or does this have a reason? I am just about to understand how the whole thing works and stand j on the hose why I can’t get the test lamp to run anymore. Thanks lg midnight blue79