Is your headlight misbehaving?
Every so often I hear from someone whose locomotive won’t respond to its 4 digit address or the headlights won’t work. This situation usually follows some programming that involved CV29, the master CV. So what’s going on? Well, if you enter the wrong value in CV29 it will make the decoder respond to the 2 digit address and ignore the 4 digit address. Also, if you inadvertently set the decoder for 14 speed step mode instead of 28/128, the headlights won’t work. The fix is really easy, just program CV 29 to the correct value and everything will work fine.
As I mentioned in my previous post on CV29 the Digitrax ap and DecoderPro will both calculate the correct value for you and most manuals have a lookup table for commonly used combinations of CV29 functions. Digitrax and most other companies have their decoder manuals online for you to download. In addition you can download their manual by clicking HERE . The lookup table for CV29 is on page 38. Happy programming!