hmmm check the two grounds up front of the car that are screwed to the rad support frame. If that ground is faulty, the hazards will/might work but the flashers won't. I had a simular problem and after searching for a while I found it was the ground. Also check all the lights to make sure they all work and check the grounds.
i had the same problem about a month ago.. for me it turned out to be the turn signal relay was bad.. ive heard of them being all over for different years but i know in my car it was behind the glove box and to the left.. its a little blue solaniod.. just buy a new one and replace the old one.. easy 5 minute fix.. hope that helps