I installed a Camecho Android Head Unit in my 2009 X3. After connecting everything to the head unit I went to plus in the green wire for the HVAC and hot air started blowing hard. I unplugged it. Then I tried to turn the car off but it kept running even without the key. I unplugged the batter and it kept running. Then I heard a pop and water started draining out of the car. But it was still running. Eventually I unplugged the small white connector from the HVAC and the car turned off. Can someone explain and assist me? Please?