Does your fan work for the a/c or heat vent? I had a similar problem and it turned out to be the ignition switch in the steering column. If the connection is loose your turn signals wont work but you hazards may still work due to the fact that hazards are meant to work even when the key is off, but turn signals dont. What I had to do is take the trim piece around the steering column off and I noticed the white wire contact that clips into the alum casting holding the bearings and springs for the lock mechinism was falling down, so I held it up and tapped the 4 small casting clips on all 4 corners of the casting until the casting was holding the white plastic piece tighter. I realize this may sound confusing, but i cant think of any other way to explain it. The reason I asked about the blower for the a/c and heat was, in my situation the turn signals and the blower would go out at the same time, and the way i found it was they would both work if i jiggled the key in the ignition. Let me know what you find, and i hope this helped.