No Blinkers :( Can anyone help?

My wife has a '95 GT and just out of the blue her turn signals stopped working. I replaced the fuse and the next day it popped. Replaced it again and a few min later it popped again. She decided to take the car to her brother yesterday to look at the problem since I have to work all week. Well she calls me last night and says it's fixed and she is on her way home. Half way home the blinkers stop working and her instrument cluster lights went out. When she got home I called her brother and asked him if he had changed out her Flasher relay. We responded with "Naw, I just went ahead and put a 30 amp fuse on the circuit so it wouldn't blow anymore.". Well right about this time you can imagine how enraged I was. He replaced the 15amp fuse with a 30amp fuse and now the blinkers and instrument panel do not light up. I took the car to Autozone an hour ago and bought a Flasher relay and replaced the original one. I then went back in the fuse box and replaced the 30amp with a 15amp as well as checked all the fuses in the panel. None of the fuses poped but I still do not have blinkers or instrument panel lights. Can anyone advise me on where I would need to check next?

fyi The corner lights do not come on when I turn on the headlights anymore either.

jrichker said:

Do the simple stuff first. Get plenty of fuses, you may need them. Remove each turn exterior signal bulb one at a time and try it with a new fuse. If it quits blowing fuses, one of the bulbs had an internal short. Examine the wiring sockets while you are in the process of removing the bulbs. Look for cracked, chaffed or burnt spots in the sockets and wiring.

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Well the thing is that it didn't blow a fuse this time. All the fuses in the box are good however the corner lights still do not turn on. No corner lights when I turn on the headlights, no flashers, no hazzards.