I tried going in to CV 29 and change the setting therein lies the problem. what needs to be done is change bit zero  if it is zero to one or one to zero. my problem is I can not get  into bit zero it starts at one and goes up from there. this is a real old  soundtraxx decoder I'm working with

I have a 2-6-6-2 that runs backwards and   I can not change the CV setting for some reason or other,so I want to change the wires  to the Motor    Hankm

Is there a wiring diagram available someplace  for a 2-6-6-2 ?