So I was running wires for a aftermarket amp and changing out the door speakers in my 2014 R56 Cooper S. I disconnected the positive battery cable the first day to remove the front seats. Reconnected the positive terminal when I was done for the day. The car started with no issues.
I disconnected the positive terminal the very next day to complete the instal job. Reconnected the terminal and the car was completely dead. No lights, door locks, windows and radio. It was like there was no battery in the car at all.
I went the very next day and bought a brand new battery, put it in and still absolutely nothing. I had to have it towed to the Mini dealership here in Dallas and the technicians cannot figure out what is wrong with my Mini either 🥺 Not sure what to do or what’s wrong with it.