I bought a Bachmann Decoder to put in a DCC-Ready Athearn AC4400. After I installed the decoder and put the engine on the track, immediately when the track had power, the engine started running on its own. I couldn’t control it or program it. Has anybody had this problem? Did I do something wrong or is it a faulty decoder?
did you remove the jumper plug from the 9 pin harness?
You bought a Bachmann decoder?
Sure sounds like the 9pin jumper board wasnt removed.
David B
That was it, thanks. I’m a newbie with DCC, but yeah I know that Bachmann’s not exactly the best. But I thought, what the heck. Never again, though. The stupid thing started smoking after putting power to the tracks. Thanks again, though.
Well…atleast you didnt smoke a good decoder.
I am pretty sure in the instructions that came with the loco, it does mention removing the jumper board.
David B
Primarily because of the jumper being left in place. Been there and done that.
thanks guys