Headlight on Heavy Mountain replacemet

[bnoem1]

Can anyone tell me if the headlight on the heavy Mountain is a bulb or LED?  Does anyone know the voltage coming out of the decoder?  And finally is there a resistor for the headlight on the decoder or before the headlight?  Obviously you can guess that the headlight isn't working, not sure what has happened.  Before I started tearing things apart I was hoping to get these answers so I can be prepared to fix it right away.  Thanks.

[James in FL]

https://www.bachmanntrains.com/home-usa/dwg/dwgs/82511.pdf

It's an LED