I am trying to use the C&O and SP hicken Spectrum tenders on the Spectrum 2-10-2 and both the light and heavy 4-8-2 (mix and match) with DCC.  Are the wireing protocols different between the tenders and the engines?  The harneses apear the same and fit from one to the other.  However, I get very strange results - the lights don't work, the engines will not run in reverse,  and the engines won't run except when the lights are "on", which of course they never really are!  I could be into a bad batch of Digitrax decoders, but that doesn't seem to be the likliest choice.  If the wiring harness protocol is the the problem, can anyone tell me how to reconnect the tender (male end) of the harness to the light board?
I do so wish that Bachman had used the standard DCC wire color coding in these tenders and in the stock tenders of the locomotives.  My old eyes have trouble differentiating between all the browns, tans, and oranges which are yet to make any logical sense to me.