Got a 92 lumina euro 3.1

REcently, the turn signals stoped working. Well, every time they were used, the fuse would blow. Checked the cam-switch, and it had a cracked contact, and then found the brights wouldn't either flash or turn on. REplaced both the cam switch, and the wiper stalk, and it hasn't made any difference. The hazard flashers work on the front, but not the back. Dunno also if its supposed to happen, but with the normal headlights turned on, the side repeaters for the flashers blink alternatively to the front lights, with the lights off, they blink in time with them.

I'm starting to suspect its a BCM (if the lumina has one) but its driving me crazy.

Thanks to anyone that can help me.