on the 89, the flasher relay is on the BACK side of the fuse box.
Its normally silver or yellow, a small round can with 2 prongs.
its Very possible it came loose, but they Do go bad.
There is a seperate thing that looks the same but bigger, about behind the idiot light panel. Cant think off the top of my head, but i think its for the head lights.
When you hit the blinkers, do the turn indicators on the dash do anything? stay on, flash, only one side stay on?
Those are signs of a bad bulb, or bulb connection.