08 528XI

Friend of my got me these after market LED bulbs to try out. Well the LED bulbs did fit into the headlight assembly so i removed it. When I re-installed my old bulb it would not turn on. So I thought maybe it burned. I went out and purchased a new bulb which also would not turn on. I tried installing the LED one again which worked the first time I installed it, but not anymore. I cant figure out what happened but it looks like there's no power coming through the wire harness.All the wiring looks good. Everything else works on that one side except the headlight bulb. The fuses are good. These are not HID so there's no ballasts either. Any ideas??