Does anyone know where to find, online or otherwise, a schematic for the "Kiersted" (sic) cable? This was the MU cable used by MBTA and possibly others that allowed an RDC to be used as a cab car, controlling a locomotive at the other end of a push-pull consist. I might have to make one up in the near future.

For that matter, does anyone have a source of RDC MU schenmatics that they could direct me to? This is just in case I have to reverse engineer the cable; I have all the other MU information (AAR standard 27 pin) but nothing at all on RDCs.