The question itself is pretty basic but I'm not sure how to title it:
What happens when you get the key from position 0 (turned off) to the moment when the battery "kicks in" and the dashboard lights up (KL30 I think)? (On average cars, I don't have any specific model in mind)
In all the cars I've driven so far, I hear sound, so I was wondering if like pumps were getting activated before even starting the engine. It's more of a theoretical question than trying to fix a problem. Underlying questions are "what kind of problem would turning the key half-way/back to 0 multiple time without starting the engine cause?" for example.