motherhupit

Anyone know what part this is and what it does its a small rectangular box with 3 wires coming out goint to a 3 pin multiplug, it of a FIESTA MK3 RS turbo OFAB, it sits by the Diagnostic Multiplug on the right hand side wing etc, mines had 2 wires cut and joined together and when i unplug this the car runs lumpy etc, the part number might be V90ofb-12b509-aa instead since the lettering was fadded, has 1 yellow wire, 1 brown wire with yellow strip and 1 brown wire, any ideas would be great cheers SEB,

motherhupit

Just tried ringing Fords but they couldn't help will post a pic of it later