Ditch lights programed

You'd have to be a lot more specific as to the specific chain and sound files you're using.  Not all of them include the ditch light function, so clearly it will depend on what you load.  The hardware is the same, so it's the chain and sound files that determine this function.

Find a similar model that has ditch lights, and loading those files should enable the ditch light function.

I think you answered my question, even though the hardware is there, it needs to have the sound files that would have ditch lights on them. I will ask this, as I am curious as why is the ditch light function showing where the lights on/off options are at. Does that get loaded regardless of what sound files are on it?

I can't say for sure why the ditch light option is presented, it's obviously in the descriptions in the sound file.  I have seen options appear where they are not active pretty regularly, I suspect they just forget to take them out when compiling the sound file.  OTOH, stuff like that doesn't always appear, so I suspect it's a mistake.