Lighting problems

Ok heres the problem... at night when i turn on the lights.. only 2 light comes up in the front of the car (theres suppose to be 4 that comes up) my back lights doesnt turn on... but it only works when i brake. my side lights don't turn on.. my dashboard lights and interior lights don't turn on.... i was thinking maybe it was the fuses.. checked it... none of them were out. thought the bulbs blew out, but thought how could all those bulbs blow out all at once.. the automotive guy said something about a short circuit... so if anyone can help me out that'll be awesome.