106 REAR LIGHTS PROBLEM?

MY PEUGEOT 106 BRAKE LIGHTS COME ON WHEN I TURN THE LIGHTS ON AND WHEN I BRAKE THE FRONT SIDELIGHTS COME ON THEN THE FUSE BLOWS, I HAVE CHECKED THAT ALL THE BULBS ARE CORRECT AND CHECKED THE EARTH TO THE BODY ON THE REAR LIGHTS BUT STILL DOING IT,,ANY HELP WOULD BE GOOD