NOTE - I don't have a way to change CVs, but I can get the loco to a friend who can. Got my 6-yr-old train-addicted son a Athearn -9 at a railroad show recently and it came slightly weathered, seemingly in good condition, and with a NCE decoder hard-wired. The hard wiring I don't understand as the loco was ready-plug equipped. Anyway, the previous owner had a lot of momentum braking setup and the throttle steps were a bit wide so I had a friend reset to factory defaults. After getting it back everything was great for a 6-yr-old to run without knocking cars off the tracks. Shortly thereafter teh headlight stopped working. The rear light still worked directionally and we could toggle it off/on. The headlight does not respond. The situation, however is somewhat intermittent as the headlight will come on once in a while and will remain working and controllable for the duration of that session when things are powered up. This functionality is VERY sporadic. All connections are good. This is our only Athearn and we really like it. Our friend who sets up our CVs for us until we get everything we need to do it right thinks the NCE decoder most-likely is either faulty or more settings need tweaked beyond resttting defaults. So, what do we do to restore headlight functionality on a consistent basis and ensure everyhting works as it should...? We could try coninuing with the NCE or I could get another decoder and wire it in and see where we are. Let me know your suggestions. thank you.