To note: my passenger airbag light has been on for around a year now. Don’t really know what caused it, because it started acting up after I did my headliner. All the connectors are on there. 

My driver side heated seat has not worked since I’ve owned the car (4 years in may). Continuity looks fine there so I’m not sure. 

I have some issues with the car when it rains or gets wet. The main one being that the boot doesn’t like to open. I have to hit the button then turn my headlights on and off to open it. 

Here’s the whole breakdown from the past few weeks: 

December 21st, I was driving back home from skiing, stopped at a drive thru for dinner. Battery light came on, power steering cut out (has happened once before). Decided to park and eat my food and turn the car off. Turned it back on and lights still on. Decided to try and get it home, car started slowly loosing functions as I drove home. Wound up getting stranded in an intersection and had a friend come give me a jump. He had to jump me one more time on the way home. I had to leave for a week for Christmas, I left the battery unplugged for this portion of time. I ordered a new alternator from pelican parts when I was out of town, didn’t get here until the 6th, installed it, had to use a battery pack to get the car to start. Started with a service engine light, presumably since I hadn’t put the front end on still. Seemed to run fine. Let it run for a few minutes. Put everything back together. Needed a jump again so my friend came over and jumped me (r56 too lol) since the pack didn’t cut it. Battery was dead dead. Started right up, no service engine light, just the airbag light which has been on for at least a year now. Drove out for dinner with my buddy, sat in the parking lot and ate with the car running to let the battery charge, drove home with no issues. Thinking I was golden, put it away for the night. Next morning, completely dead again. Got a ride to work and brought my battery with since we having charging and testing equipment. Charged and tested battery and checked alright 12ish volts under load). Put it back in when I got home then I was having similar issues as seen here. Lights turning on and off, power steering cutting in and out. Was generally misbehaving. Decided to just go get another battery in case something with the alternator just screwed it up. It was an AGM interstate battery from Costco. Went and got another identical one. Put it in, same issue. Cut to today being the first time I can try and diagnose things. Checked the fuses that could affect things, checked the easy to get at grounds, and as many connectors I could find. Everything looked ok so started up and still the same issue. First video is when I started it and something started squealing like liquid was getting shot out of something which made me turn around and look at the battery. You can kinda hear it in the video. Another video shows my gas and temp gauge holding position with the car off (wondering if this is what drained my battery in the first place?) The rest of them is general things I was noticing. I also broke my window regulator because I think it pulled too hard on it or something (it was a cheap one but I’ve been running it for a bit now). It seems like a ground issue but I don’t understand why everything was working the first time I went and drove it, then it just decided to stop working. 

Ground and plug on the alternator are tightened down nicely (tab facing down) and plugged in securely. 

If anyone has any suggestions let me know/if more info is needed. I really don’t wanna take this to a shop if I can avoid it. 

2005 S - Replaced my alternator now it looks like either ground or BCM issues. Help would be appreciated