I’m sorry that I open a new Fred again but everything has become confusing. I’ve been reading all Freds here for a week. Please don’t hit. To my problem: KBW has no current, yellow lamp always starts badly. If I turn off NWS plug it goes out immediately. Rosi… has written plug check whether voltage.. Have turned on the plug that goes apart to the onboard computer ignition and with a phase tester against minus on the battery I have Pin 1 Grey/Black Pin 2 Red/grey (or white) Pin 3 Brau/ red Cable controlled from KBS to computer. No break or something before I tear the computer apart now I ask here again if there is another idea, especially since here in the forum it is written again and again that the on-board computer is very robust. Listen to the inlet air sensor. I also hum for about 1 min when I start the ignition. It also seems to funk. Again excuse. Markus