Hi,

I purchased a Marklin 37040 from eBay and it arrived yesterday, when I put it on the track my ECos didn't even find the loco. After trying for a while to get it detected, I gave up and went to an old test that always works, see if it works with a conventional control which it did not. The buyer told me it had been tested and everything was working, I didn't really have reason to doubt the seller as he has very good ratings. I looked at the schematic of the train and noticed it has a plug in decoder so this got me thinking that perhaps during it's journey the decoder was jostled and not making a proper connection. I re-seated the decoder and got it to work but whenever I put the cover back on the tender, it stopped working so I had to go re-seat the decoder again. I finally tried to bend the prongs out from the plug a little bit so the decoder was more snug and so far that seems to have done the trick. What I'm wondering is if this issue is common with engines that have plug in decoders that if they aren't super snug, issues like what I experienced could occur?

Thanks

Regards,
Mike

it depends which pins you are talking about, there are an 8 pin plug, 21mtc plug or a Plux22 but they all have the same function, with a 21 mtc you have to make sure the decoder is pushed right in, the Plux22 isn't as bad as you can push it down onto the circuit board, the 8 pin plug shouldn't be a problem at all.
I had the same issue on occasions whereas I didn't push the 21mtc decoder right down

John