To be certain, you should:
1. Consult your owner's manual: This is the best source of information. It should have a diagram showing the location of all fuses and relays.
2. Check online forums: Search for "1994 Pontiac Trans Am flasher relay location" on forums dedicated to Pontiac or classic car repair. You'll likely find pictures and specific advice from other owners.
3. Look in the fuse box itself: The fuse box often has a diagram printed on its inside cover showing what each fuse and relay controls.
Remember to disconnect the negative battery terminal before working with electrical components.