Had a search of the forum without success...
Hoping to identify the relays in the interior fuse box (near right knee) and the external fusebox (under the plastic cover in engine bay).
Please can anybody direct me to suitable threads, or identify the annotated pics attached.
Many thanks,
Tom

I suppose we are talikng about Seicento 1,1?
If so then we have in the cabin fusebox pic 2 the following.

1=heated rear window
2=horn
3=ignition auxiliary circuits
4=front fog lamps
5=indicator relay
6=electric window

In the engine bay i am not sure but i guess it will be the coolant blower and the ignition relay. Unfortunatelly i do not know which is (A or B). You could try to test it if you remove for example one and try to start the car, or when the blower starts removing the relay will saw you if you are correct.

I hope i was helpfull.

Thanks for your reply, Spiderman. Much appreciated.
I'll test the theory on your suggestions for the engine bay relays and report back to confirm.

Doesn't the cover for the interior fusebox have a map of the fuses and relays on it?