I have a 2006 VW GTI. I went to install my d3 in last night and after color matching ALL of the wires, i plugged the harness into the back and the fan turned on and it booted up! I did a few searches on here but couldnt find anything related to this. I found one on here talking about his battery being drained all the time but gave no indication that was the same problem i have. please help me gurus!