Lionel PRR L-1 Mikado (2331030) Headlamp no longer working

A reset in TMCC world is usually just a “reprogramming” of the ID then entering “AUX1” AND the code from the manual. For Legacy engines its usually AUX1 + 1 or 2 for steam or diesel. But a few years ago they started just needing a new ID.

So for this one, it should just be:

1) power off track
2) switch engine to PGM
3) apply power to the track
4) on remote press ENG, NN, Set (where NN is your ID)
5) power down track
6) count to ten
7) change the run/pgm switch back to RUN

Then reapply power to track and address engine as usual.

The LED is just a white LED.  If you do have to replace it, I'd use an amber one, more period correct for the light color.

John, you don't happen to know the voltage of the LED off hand do you?
I'm not opposed to just adapting one. I've got plenty of spare MTH ones lying around.