When you remove the instrument cluster, often the basic settings in the ABS system are lost.
I've read several threads where as Bruce commented here that when ever a Instrument cluster or (I think) a ABS unit is physically disconnected the coding or, in this case, the basic settings are lost for one or both units ; why is that? Many times the power / battery is disconnected from the system for long periods of time and this coding lost condition or loss of basic settings does not occur. Is that loss by design ?