D100 box help

[chris p]

Does anyoine know the dealer name / descripton for the D100 box that sit behind the dash

Basically i have a hightpitched beep which is continuous (beeeeeeeeeee..etc) while the car is running, its not one of the oil pressure /water level /temp etc sensors as they are all fine.
Called reworx and they said \'yeah its the d100 box which controls lights & indictors and a few other things, (so i thought great ).
Thing is the local mazda parts dept have no idea what this is and no search brings anything up, anyone know exactly where its located or what its dealer part name could be ??:3Confused

[RobbieRX-7]

F100 ECU mate. They go for around £25.Put a wanted ad on here and fduk.org