Moin, I’m about to have a final exam and I can’t handle the topic of electrics. For the exam: I have to be able to diagnose a mass closure, a plus closure and a cable break with a multimeter. Now I’ve watched some videos on YouTube, but I’m not smart about it. Why do you have to switch the component voltage-free? How is what measured? How do you recognize exactly a mass closure, plus closure or a cable break? he lamp doesn’t come to Plus on earth, plus pulls power from another consumer and lights up because lamp gets power permanently. In case of a cable break, the lamp doesn’t glow either, because the cable from Plus is broken. I’m already halfway aware of that. How do I measure what, what is it? E.g. How do you proceed with a multimeter there? Do you happen to have some instructional videos on partitions? Thank you in advance Paul