How to add a DCC Decoder to your Irish Railway Models (IRM) NIR mark 2B Driving Trailer 

There is a separate reed switch for the cab light if you don't want to fit a decoder just for that. If you wave the wand around above the door behind the cab window on the left hand side the cab light will respond 🙂

I use business cards to keep the clips from re-engaging once I have them out.

Be sure to check if they have the right bogie size rhe white enterprise coaches have wrong bogies on them so just check them to be sure