i work on fiat/lancias for a living,will try find out,would say it has a trigger from boost switch in loom to relay box or soetimes a stand alone relay box with say 2 or 3 in,they are norally under dash on either ns or os footwell,right up under the dash,will confirm if i find out anymore,mostly see hfs and uno ts/puntos,but done a few grale's.hth,cheers,neil.