I purchased a Digitrax SFX004 Sound Bug for my Bachmann HO GP40 DCC loco and can not figure out how to program the "CV's" using the Bachmann DCC controller that I have. I understand how to program a loco for a different address 01-09, but I do not know how to use the Bachmann controller to change the sound on the SFX004 from the factory set Steam (CV60=0) or Diesel (CV60=1) .  Just like typical loco's, the factory address for the sound card is set to 03.

Thanks guys. I think I'm going to go the way of the relay using the bridge rectifier. I can use the frog wire to power the relay which is only powered in one switch position and then tap into the continuous track power within the crossover to supply the LED's.

Craig

Does anyone know how I would wire a Green and Red Signal Status light (LEDs) to a Bachmann DCC turnout such that I get one light for mainline direction and the other when the DCC switch is thrown to send the train off the mainline?