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Normally this would indicate a short usually through the motor brushes. But as it only happens once I suspect that it's the DC side of the circuit being activated. Have you disabled the DC side. This is done through CV 29 and I think CV 13 on a TCS decoder. The easiest way is use Decoder Pro and disable the control CV there.

Charles Emerson

QUOTE (firefly @ 17 Dec 2008, 05:41) <{POST_SNAPBACK}>Hi there,can any tell me why when I switch on my NCE Power Pro system on my on30 layout which has got eight locos fitted with TCS decoders, two off the Bachmann locos front and rear lights switch on together on and off momentary just once,after this happens these two locos run ok with no problems,any ideas why. mike.
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