@gunrunnerjohn posted:You can use a TMCC RCDR from Lionel to handle dummies, they do lights, serial data, and couplers. You can also just sky-wire the R2LC of most any vintage to do the job. Just search for RCDR in the parts and pick one of the TMCC versions. You could use the Legacy models as well, they work fine with TMCC control.
I've added TMCC sound to a Williams dummy B unit E7 diesel with a combination of an ERR dummy engine board and Railsounds Commander. ERR does not stock the dummy boards any more and (sorry to reveal my ignorance) I'm not sure if that is the same RCDR component GRJ is referring to.
The ERR dummy boards were easy to set up and would drive the newer Railsounds Commanders whereas the Mini Commander would not - for some reason I never understood.
