I just got my Alpine head unit installed today, after it came just yesterday. However, everytime I start my car, all my settings get erased. I also have to power on my head unit everytime I start the car. I had a shop install it for me today, since I have a lack of knowledge of what I am doing in that aspect. I would've done it myself, but the previous owner of my car cut off factory wiring harness. Is this an issue about something I didn't read correctly? Or does it have to do with the install? And how would I go about fixing it.