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-   -   Odd short on DC. (http://www.modelrailwayforum.co.uk/showthread.php?t=12565)

brian1951 15-09-2017 04:50 PM

Odd short on DC.
 
Today i have got myself a short, locos are fine in one direction, but as soon as i change direction they only travel a few inches, odd one this.

Footplate1947 15-09-2017 05:25 PM

I never had that one before Brian.
Have you tested the controller out puts. John

brian1951 15-09-2017 05:31 PM

Yes John, its a short somewhere, but narrowing it down on 80ft of track will be fun.

Footplate1947 15-09-2017 05:42 PM

If it is 80 odd ft of track you must be able to switch off all the sections to make it easier to locate the short. Or at least which part of the layout it is. Then switch them back on, one at a time. That would find which part of the layout is the culprit.
But yes you do have job on your hands. Wish I could suggest something more to help. Sorry don't have any better ideas. John

whizzo 15-09-2017 06:00 PM

HI Brian, just an idea are their any cross over points ?? (some thing shorting the insulated joiner ) or is it fed by 2 controllers 1 up 1 down short on the second controller - train moves few inches - controller cuts out , loco stops then moves again ,until cut out -- etc etc - sorry that I cannot help more regards Dave

Teedoubleudee 15-09-2017 06:38 PM

Strange indeed Brian. OK in one direction but not in another. My first instinct would be the controller, have you another you could test with?

scratchbuilt 15-09-2017 06:42 PM

Turn the loco end to end , and does the fault stay with the loco - or the track ?

brian1951 15-09-2017 06:42 PM

Yes Terry been there tried that, the only difference being the second controller does not trip but locos runs very slowly and track voltage drops to half.

brian1951 15-09-2017 06:44 PM

Quote:

Originally Posted by scratchbuilt (Post 139063)
Turn the loco end to end , and does the fault stay with the loco - or the track ?

Nothing to do with Loco.

whizzo 15-09-2017 06:56 PM

are the controllers hamart/ morgan -- if so look at the wiper panel or change over to the other controller /( wiring mat goes high resistance ) - I have had problems with the h/m at the club regards Dave


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