DCC display goes off [Select]

[Rookie1707822686]

Hi all,

I have bought a Select DCC controller, I had connected it to the tracks, but I whenever I put the DCC enable locomotive on the track DCC's display goes off and a tik tik sound is coming out, I am not sure that the sound is coming from tracks or from DCC itself, but locomotive is not getting registered, when I take locomotive off the track, display comes back and tik tik sound stops, what could be the reason behind this coz I have already spent alot of money on decoder and DCC, kindly suggest.

Thanks.

Please help!

[Chrissaf]

Almost certain that the locomotive has a 'short circuit' fault. You can confirm this by putting a multimeter across the wheels set to measure resistance.

Multimeters can be purchased cheaply off ebay for less than £8 delivered.

[Rookie1707822686]

Thanks! But there is a catch, after all effort I decided to remove decoder (8 pin decoder) and run locomotive by a simple Dc current and it ran. What do you say about it.

[Chrissaf]

That doesn't change my diagnostic diagnosis. It just points to the decoder being faulty and creating the short circuit between the black and red wires on the decoder.

[96RAF]

Reverting the loco to DC by inserting a blanking plate simply connect the wheels on each side to the motor direct. When a decoder is plugged in you use all 8-pins and if there is a short twixt any two the fault will show. That is in addition to the possibility of a duff decoder.

Lift the decoder socket and ensure there is no solder tracking between pin traces or incorrect wiring. If you have one try the decoder in a known good loco, rather than risk another decoder in this loco.