Locomotive Directional/Constant Lighting

Are there any manufactures out there in the model railroad world that make Directional/Constant lighting circuit boards for a locomotive? My intention is to install these on my “blue box” locomotives. If not i’ll attempt to copy a circuit of one of my locomotives that have it.

YES. Check the Walters Catalog. or …
JSR boards - for Stewart and Athearn loco’s from Caboose Hobbies,

I assume you are doing this for a regular DC setup, and not DCC.

I recently installed constant and directional lighting for DC in an Athearn SW7, using a unit manufactured by Accurate Lighting. Had some problems with the unit fitting properly, but after I made some modifications, the unit has worked perfectly, and I’m very happy with it.

RAM Track also makes constant lighting units for DC engines. I have bought some of their items, but I’ve never installed one of their units myself.

–Dave