I recently became a mini cooper s owner but I do have a slight problem. I recently completely switched out the whole stereo system out. It had a harman kardon in it. I took everything out from the hu, all the speakers and the amp. There was nothing wrong with it. Everything worked fine. I just wanted a better sounding system. I replaced everything with all Kenwood excelon equipment. Kdc-x996 hu, kenwood 6.5 component speakers. Rear 6x9 are x693 . Two kenwood amp. X500 for the sub and x450 for the rest of the speaker. I also added a audio control epicenter. I ran completely new wire to all of the component. Here's my problem. After changing everything my car wont start. I turn the key on and everything lights up like it should but when I turn it over. Nothing, not even a click. I killed the battery in the process of installing everything. I had the key on which killed it. I was switching my power window up and down on the passenger side because the plug came loose and had a heck of a time getting it plugged together. I was using the window switch up and down to make sure it was plugged in right. I also here a slight buzzing sound under the dash now. I don't remember if that was there or not before. I also notice now is. Before when I used my key fob to lock the door it beeps now. It never did that before and another thing I notice is my wiper arm flashes now. It didn't to that before. My mini is a first gen 2003 s. Any help would be greatly appreciated. There's a mini cooper rally I would like to go next weekend and would like to get it fixed before then. Thank you for your time.

 

It sounds like a flat battery.

 

"I killed the battery in the process of installing everything."