I've got a ALFA 75(milano in usa) 2000cc twin spark fitted with a bosch motronic 4.1 system (simuler to cavilier 2000 up to 90) There is a 3pin diagnostic scoket fitted how can I get a output from it & what form will it take? there is no system light fitted Thanks in advance no replys so far can anybody help general boach motronic info may work thanks john thacker