The latest exercise has been to fit decoders and LED lamps to my HST125 which has two power carsof almost identical performance.
The lead car took 30 mins to provide a good working unit. Then the trouble started!
My reasoning said that the wiring would be identical and it would suffice to simply reverse the normal direction anf things should be good.
On the test track this proved to be the case but transfer to the running track usually showed that the simple act of picking up the loco caused the direction command to flip.
Equally, switching off the lights prior to this movement means that they are off - period.
One of the decoders ended up refusing to drive anything although still programable.
There must be a switch sequence which Bachmann decoders obey to disable lights (apart from the rather obvious on/off control and the function 0 select). It must be related to the "go to address 03 command"!
And yes I have verified the wiring etc and run the system using other decoders! Is there a hidden secret known only to the trade in which Bachmann 36-553 decoders misbehave so and why are they suddenly so scarce?