Problem solved. The cabin lights are assigned to function one in DecoderPro. I just check off F1 Pad for forward and reverse headlights under the Function Map tab. When F0 is pressed the headlight turns on and so do the cabin lights. When you go in reverse, the headlight turns off but the cabin lights stay on. One more thing, the green wire must be soldered to the 8 pin connector in the appropriate location. I notice that some Digitrax decoder 8 pin connectors do not attach the green wire.

Was this issue ever solved? I have the same problem. How do you turn on the cabin lights after switching over to the new PCB board? I have installed a Digitrax SDXN147PS. All the L and R wires are soldered into place. Works will except no cabin lights.

Nice job Jonathan.  And yes I know that mounting the back up light on the back of the tender was prototypical.  My wife worked on the Pere Marquette 1225 in college and to remember her work on it we purchased the Bachmann model of it.  I noticed that the back up light is on the back of the tender where you placed your light.

However, I am modelling the Milwuakee Road and the back up lights on its 2-8-0s was on top of the tender, in fact, most of them appear to have been on an elevated stand that looks to be about two feet above the top of the tender.  So at a minimum I want to get the back up light on the top of the tender.

And ABC a Vanderbuilt tender would not be appropriate because they did not use them on the Milwaukee Road, at least I have never seen an example of one.

I wanted to add a back up light to the tender of my 2-8-0 and I was planning to do so by ordering a brass back up light and a lens.  However, this would involve having to struggle with getting a light to work with the brass back up light.  While viewing the Bachmann website I noticed I can order tender shells and this has led me to some possible alternatives. 

Do any of you know if one of the tender shells with a back up light will fit on the 2-8-0 tender frame?  In particular, some of the tenders used on the 2-10-0 or the 2-10-2 look particularly appropriate, but there is no dimensional data on the Bachman web site for me to compare with the tender that came with the 2-8-0.  I measure the 2-8-0 tender to be an HO scale 28.5 feet long and 9.75 feet wide.  What do the tenders for the 2-10-0 and 2-10-2 measure?

Another alternative would just be to swap tenders.  For instance, I could order the 2-10-0 tender shell and frame and substitute them for the tender that came with the 2-8-0.  From other postings I see it is important to also move over the 2-8-0 circuit board if I try this approach.  Are there any other issues I should be concerned with if I try this alternative?

Lastly, from the exploded diagrams on the Bachmann website, I see the parts and their numbers for various back up lights.  However, the Bachmann webpage does not list these parts being available online.  Do you know if it is still possible to order them?  For example, back up light no. 83801 from the 2-10-2 or no. 84302 for the 2-10-0 would both work for me.

I welcome any suggestions or advice.  Thanks.