Hi, I have bought another Hornby class 43 HST (power and dummy cars) from ebay. Again, it's probably from around the 1983 age. It has been converted to DCC, and only the power car has a sound chip. The dummy car has a standard Hornby decoder for the direction lights.
I put the dummy unit on the test piece of track in the workshop, and took the green and violet wires (along with the blue wire) and installed a cab light and a guard's light, respectively. They now operate on F1 and F2, along with F0 for the direction lights.
All well and good - when I took the dummy unit off the test piece and put the power unit on, the sounds work well, and the blue & green wires become live with F25. The dummy car does not have an F25 output, only blue + and green & violet.
If I couple these units together and push F1, F2, etc for the dummy's lights to illuminate, surely the sounds will alter on/off on the power car, along with the cab light and guard's light of the dummy unit.
I have a Hornby Elite up in the loft, and a Hornby Select in the workshop. Is there a way around this? Or would I have to buy a sound chip for the dummy car?
Thanks in advance.