Re: 1997 145 Radiator fan relays
If it's the same as my 146 the relay is in front of the battery, under a black plastic cover. Three red relays. Left is fuel pump, centre is radiator cooling fan, right is A/C compressor.
The wires on mine had all corroded badly and all three stopped working. Check for loose wires and if you find any clean them up and try to reattach.
My more permanent repair was to cut all the wires, atach spade connectors instead and fit directly onto relays. I also bought new relays although not from Alfa at £9 each, but from a local factor at £4 each. They are just standard 30amp relays.