JUST PUT 2 NEW SHARKS A&B ON DCC RAILROAD UNITS RUN FINE BUT NO LIGHS CAN BE TURNED ON IN THE A UNIT
Do your Sharks have headlights?
Do they have decoders or are you running them on address 0 (address 10 with E-Z Command)?
If they have decoders, were they factory installed?
If the lights do not come on when you press button #0 (#10 with E-Z Command,) what if anything does happen?
Have you changed any CVs? (Including changing address)
Have you tried resetting the decoders?
Are you by any chance running these locomotives on regular dc?
These and any other details that you think of could make it possible to figure out what is going on.
Jim