Yeah, the headlights pull a lot more juice than the lower wattage bulbs such as the corner and interior lights, so they won't turn on if the battery is as low as yours seems to be. It's the same reason your interior lights work, but the starter doesn't even click.
1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
Last edited by ZeGerman; 11-15-2012 at 04:15 PM.