Check the plug to the back of the loco? Is the decoder seated securely? Did you use the 8 pin harness? Was there disc shaped capacitors in the Bachmann locos? If you put the jumper plug back in does the loco run?
Thanks for the help
I got the Bachmann to work
Evidently despite looking like it was firmly seated and despite removing it and trying again for some reason good contact wasn’t being made --hard to believe but I tried one more time and works well