Hello, nice to greet you and at the same time congratulate you for your good information on mechanics, yes friend, electrical work requires a lot of attention, and above all you have to use the right tools, such as the tester to identify the phases, because any carelessness, we It will cause an accident or a big scare, because a current is not good, although I think you have received electric shocks with the coils of the car, haha. Greetings.