i cant remember off the top of my head but a quick check in a haynes manual will tell you.
a fuel pump relay will cost £1-2 from a scrapyard so it is worth a try, however i've never heard of the fuel pump relay needing replacement on these cars. can you describe what happened when the car died? Did you get the injection systems warning light illuminating before or during the engine failure?
the injectors on the 1.6 models are very prone to failure, and even fiat dealers can have trouble diagnosing the problem. also the coil tends to fail fairly often.
before you assume a new fuel pump relay or ecu is needed you should test your injectors and coil. the resistance of a 'good' injector is usually 14.5-15ohms, although 14ohms is acceptible, any less and the injector is in need of replacement. to test them you can disconnect the injecotor wiring harness multiplug, its to the right of the fuel rail. there are 5 pins in the connector, the cenre pin is earth, the other 4 are each for an injector. measire the resistance across the center pins and each of the other 4. the HT outputs on the coil can also be tested for resistance. measure the resistance across the 1 and 3 outputs, then compare this to the resistance across the 2 and 4 outputs, similarly you can test the coil LT input pins in a similar fashion. both measurements (1&3 vs 2&4) should be very similar (within 10% of each other) a large difference would indicate a coil failure.
you said your car died on you, if that means the engine will not run at all the coil is most likely the culprit, if the car starts but idles very rought then an injector is more likely to be the cause. this is because a coil failure will affect 2 cylinders making it practically impossible for the engine to run, whereas an injector failure will only affect one cylinder and cause rough running.
if the engine will start you can also do the test in a more simple way, with the engine running you can reomve one plug lead and then replace it before removing the next. the removal of each lead should make a noticable difference to the revs, they should appear to drop. if removing one lead makes no difference then the injector on that cylinder may be faulty, if you notice no differnce on 2 leads the coil is more likely the cause.
if you can describe the car's problems in more detail i'm sure we can find the problem, also the results of the above tests would help with the diagnosis.