Any ideas please. I have, eventually succeeded in fitting a Massoth eMotion S sound card to my rail bus and trailer. Great sounds. However, f1 now not only sounds the horn but turns the interior lights on. F1 again sounds the horn and turns the lights off etc. Also as well as internal light functions f1 intermittently not only sounds the horn but then rings the bell followed by station announcement. Clearly something is not right but I’ve no idea what. Any suggestions please. I know that Phil may be able to assist. Thank you.