As a follow up I talked to Bachmann customer service and the replacement tender that I have is not plug compatible with the 2-6-6-2 engine.  So the easiest solution is to take the guts out of the original tender and fit it into the replacement tender. 

As far as the front light not working, that will be fixed.   It will be 4-6 weeks for the repair according to the postcard.  Replacing the front light is not an easy job.  Almost nothing is easy on that locomotive.

THe tenders are hard wired, not pluggable.  I will post pictures later today.

I got my new 2-6-6-2 and have two issues.

1 - The front light does not work.  I figure that something isn't plugged in correctly.  What do I take apart to check for a loose or unplugged wire?

2-  The tenders (BAC-89831) that I bought for it refuse to program.  I am using a Easy-DCC system.   Any suggestions?

3 - If I decide to replace the decoders in the tenders, what is the wiring color code?