ahhh just went through this nightmare. I ended up replacing my multi function switch, flasher relay, and the fuses. There is fuse 13 in the fuse box there is also fuse 9 that is in the power distribution center under the hood. This is for the hazard switch side of the wiring, if this is blown it may back feed. If that is not it then it may be a short somewhere in the system. The only thing that will throw you off is that the hazard wiring uses most of the turn signal wiring except for the switch and the power supply. I also still have not tried my four ways since I got my turn signals back, but my turn signals work and that is all that I cared about.