Interestingly, the Haynes electrical diagrams for the carbed SS show the fusebox layout with fuse B2 including the regulator as well as the fuel pump and ignition. None of the fusebox covers I have seen mention the regulator. Looking at the diagrams, there is a connection to the regulator from B2 but the main 30Amp fuse by the battery is specifically for the regulator and nothing else. When an RR51 regulator is fitted, the B2 connection definitely becomes defunct, as does the main big 30 amp fuse by the battery, although if that circuit is OK, it can be used for the RR51.
the one with the fan on is for 916 you cant get the SS decal any more but the complete cover is available 24610491A
