Hallihallo, SAM in the 450 is the central control of the cube. Since I lack some things that are standard in my big one, I am just thinking about the possibility to intervene from the outside controlling. Please correct me in the following statements… The whole switches for light, window lifter and convertible roof are actually only there to tell the computer in the SAM which relay it has just switched through. SAM is controlled with 12 volts of switching pulses from the respective switches. If I implement on a switching wire from the outside by means of a circuit 12V, SAM shakes and does what the switch actually says. Background is the following… I’m terribly disturbed that the interior light runs out when the ignition key is turned. But I don’t want to buy a module for x-Euro now. Here a few transistors and Elkos rolled together on a circuit board would be a small help… So, where are the professionals…? Thanks…