Odd Legacy/Trainmaster ZW-L problem

I guess no one is having or had a similar problem to what I am experiencing?  I've been through the BPC2 and ZW-L manuals and reprogrammed both units.  I'm still having the same issue with both tracks being powered by both throttles.

I have noticed that when I power either throttle up I can see the voltage increase on that meter but I'm also seeing some response on the meter of the other throttle.

I don't know but sounds like maybe the tracks are not isolated from one another. Probably not the BPC but the track itself. On tubular track use fiber pins on the center rails where the tracks connect from one block to the other and sometimes I have seen where the track touches just below the pin. That is all it takes to mess things up. Maybe  check your track real carefully. Hope this helps.

Hi Gweedo (love the name),

I'm pretty sure that there is no power crossing over from the switches.  They are Ross and the center rails between the lines are isolated in such a way that you actually have to add power to them to make a crossing move.  I disconnected the power drops between them to make sure there was no power jumping between the lines.  This is really frustrating me as I already have a BPC2 and a CSM2 that are bad. 

Yea I don't really know to much about the BPC2 units. Never really understood how they worked. Sounded kind of confusing. I use SC2's for block control. Switching the BPC2 units would probably end up with the same results from the sounds of things. Hope you find the problem.

Have you eliminated the possibility of a ZW-L issue by disconnecting the transformer and testing each trottle output separately?

Have you tried disconnecting the BPC2 units to provide power directly from the ZW-L throttles to tracks 2 and 4 to evaluate whether the same issue occurs?