My son got an Hitachi 800 5 car set for Christmas. (DCC ready). We added a Loksound 8 pin sound decoder to the loco. Works a treat. However, the lights on the dummy car don't work as there's no decoder yet. My question is what decoder do I need to have the lights working? This is what's in the dummy car. Do I need a Locksound one for it to work, or can any decoder work. The limited instructions say about CV29 and setting it in reverse. I can manage that, but not sure what decoder I need. I can't see the dummy car has any other functions. Any help appreciated. Will make my 8 yr old very happy! Thanks in advance!