its under the crank shaft right by the underlay belt. remove the distributer cap and make sure your drive train is straight. once you've done that just loosen the 4 bolts from the alternator and...
probably needs a new flasher (round aluminum or plastic....its in the fuse box, there is one for turn signals and one for emergency flashers) swap the 2 to test....this is a common issue with 5th aves