Turn Signal Flasher location in 93 Mustang GT

The flasher is a small round plastic cylinder (unless replaced with a metal one) behind the left edge of the glove box that will look similar to the one in the fuse panel. The first step is to squeeze gently both sides of the open glove box and let it swing downward. It will be snapped into a metal horizontal brace just to the left of the glovebox opening by a small tab and have two wires attached. The number more than likely will be a #552 although I have seen a factory one with a Warner #224

Its behind the glove box

It is near the center of the dash below radio

Hey my name is rico i had the same problem and i fix it actually my hazards wasn't working needer but signal lights an hazard lights are in the same circuit but both of them has separate relays;1 signal light relay is in the fuse box,2 hazard light relay is located behind the glove box ,you take the glove box apart ones you've done that stick your hand in the left side of the frame where the glove box was located and you'll find it is screw to the dashboard metal and is really hidding but thats the easyest way to do it trust me i had to remove almost the whole dashboard but i finally got it and my signals and hazards are working like new;remeber the signal light relay can interfier with your hazards or biceversa.

The turn signal flasher is located on the instrument panel reinforcement flange above the fuse panel. To remove the flasher, rotate the unit 90 degrees counterclockwise to disengage it from the mounting slot, and disconnect the the wiring plug.