There is only one for the fuel pump.
On the V6 fiero's it is located on the driver side fire wall (in engine compartment).
There are 2 little black relay boxes behind the air cleaner. The one is the air cond. relay (if car is equipped with a/c) and the other is the fuel pump relay. Both look the same.
You need to remove the air cleaner to get to the relays (can't remember off hand which is which). As I said they are both the same. When I replaced mine I replaced both of them (they costed like 2.00 each).
Hope this helps!
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Keith
1987 Fiero GT