2002 Chevy Blazer, Headlights don’t work

I drive a 2002 Chevy Blazer LS. About a month ago I hit a deer and destroyed the front end of my vehicle.  I have reassembled everything and it all works just like new except the headlights!  When I turn the vehicle on all four headlight bulbs come on (high & low beams) but only the drivers side LOW beam is illuminating at the "proper" brightness.... the other three bulbs are VERY dim, like when your battery is almost dead....  Also the parking lights do not illuminate at all... except when you signal for a right or left turn.  Then the corresponding bumper light works.  I've checked the fuses, re-grounded the headlights, and cussed at them..... nothing seems to work  :( 

Any help that you guys could give me would be greatly appreciated.....

Thanks,

layinframe_95