fiesta rs turbo problem

[mikeyjc]

i have a fezzy rs turbo and the person who owned it before me had been cutting about the wiring from the ecu. i managed to solder it back together, but have a problem!!!
i noticed on others that there is a small black box thing on the bulk head which had a earth wire to bat. and another wire what come from the map sensor then the other went to the ecu. can any one tell me what colour the wire is that goes to the ecu? i think br/bk but dont know what pin number it is.
please help.