i agree with marlon its for a switch that ignites a discreate jet engine in rear floor panel where the spare used to live ,dont short the wires as it will iniciate the front bumper sub machine guns !!!
If the cable runs towards the rear cabin heather vent at the end of the centre console it might well be the predisposition for the illumination of the vent's open/close wheel. Some versions of the 155 had these illuminated.
Now we're getting somewhere as I am planning to illuminate all open/close wheels, I've seen it before on Lancias but didn't think the 155 had it, does anyone here have them illuminated and can those lights be ordered from Alfa? I'm planning to put LEDs in.