Woody - I think you've got more than one question ... if there's no relay shown on the 51 diagram, then it's no doubt because there wasn't one [or one was only used if there was an optional 2nd horn added?] ... the one sold as 47-54 is really for
whatever year they started, possibly 54, but suppliers make assumptions - maybe the year range means that relay is for 6V, it does look different than the 55-59 relay. although that might just be cuz the later relay is configured for a harness plug rather than screw on spades
Bill
