Stop Lamp fuse keeps blowing

[aleph1]

i have an 89 240sx. For some reason after my oil change (im pretty sure i shorted out somewhere on the alternator while taking the oil filter off, as I blew the fuseable link for the ALT(75A, already replaced)), anyway my brake lights stopped working. The fuse was blown, no biggie, got a new one. I put it in and stepped on the brakes, they lit up for a second and blew the fuse again. I tried another fuse, did it again....

I guess its a short, but I dont know where to begin to look, anyone have a similar issue and had any ideas?