Hello people! Since I suspect the expert people here in the forum I throw a question into the round: Suppose I hire a working strobe lamp from Bosch with which also the closing angle can be set. Get it back with the remark : Does not work, is broken. And now it really does not go. After several inquiries I ask how the lamp was connected and the colleague answers:On the battery, first on minus and then on plus to avoid sp Somewhere he would have connected to the battery if the ignition was switched off. So, I learned in my lesson that (unsecured) consumers first connect to Plus and then to Minus and that a battery also has juice when the ignition is switched off. And I mean that he has fabricated a short circuit. Does not he mean. What do you think? Thank you for helpful answers!