To find the relevant fuse or relay, you'll need to consult your owner's manual. This manual will have a fuse box diagram that clearly shows the locations and what each fuse or relay controls. The diagram will likely be located in the owner's manual section covering fuses and electrical systems.
If you don't have the owner's manual, you can often find a digital version online by searching for "1994 Pontiac Grand Am owner's manual PDF". Alternatively, you could visit a Pontiac specialist or a reputable auto parts store; they might have access to wiring diagrams.
Remember that working with the electrical system of a car can be dangerous. If you're unsure about any aspect of this process, it's best to consult a qualified mechanic.