Look on the fuse block for a small silverish box type device (should be two or three sometimes) that plugs in like a big fuse would - that should be a/the circuit breaker for the high or low beams if I remeber right. Pull them one at a time and see which lights work. Replace if necessary, but I would bet problem is not breaker - it's something in wiring causing a grounded circuit.
If you can't find breakers on the fuse block they may be in light switch or mounted on fenders under hood. Get a schematic for your car and trace it out.