Can anyone tell me how many working fogs there are on a Ford Puma?

My mums mate needs to get his Puma mot'd, it has a broken reflector cover on one of the fogs and so needs replacing anyway, but he is saying that it doesn't work...is this a case of the same as the escort, one works and one is just a fake or is it that it should work and its a problem with wiring or the unit itself?

Thanks in advance