car head lights

i just put a system in my car... Its been in there for about a week and nothing went wrong until the other night when i went to shut my head lights off, the light went off, but neither one of the lights went down. I cant figure out why this happened... Maybe the system had something to do with it? maybe the motor went bad on the lights, maybe a fuse blew... I know this stuff happpends alot with these cars so ne help with be great... thanks

Seriously with all these little things just check the lights first

maybe u jus hit the button for the headlights...? but i dont see how installing a system would interfere with that unless u clipped the wire for the headlight motors. but thats really unlikely.