If it's anything like Sierra/Granada it's actually quite involved, for a start there are two ECUS controlling it, yours dosen't look so comprehensive though so I don't think it will have both, (i.e. bulb outage)

It does however seem to have a service light etc so it may interact with the main ECU only in which case it may just piggy back off it, if there is additional wiring I will imagine it will be unique to the high spec models so you may need a different loom in which case it's not really viable!

Martin