You might have blown a fuse for the low beam lights. Also, if the wires were just cut for the fog lights, make sure the switch is off, and stays off, or tape the two wires separatly so they don't touch. if the accident was bad enough to rip the lights off, it might have cut or rubbed the wires else where causing a short. The only reason I could think of why one of your high beams isn't working is a short in one of the wires. If something moved and rubbed after the accident then that could cause a problem.