Hi Guys,

Thanks for your assistance on this.  I will check those items.  A member of my model rail club also suggested that in the loco itself there may be a direct connection between the power pick upos on the wheels and the motor.  Does anyone know if this is true.  I was assuming that the pick ups in the loco fed into the PCb in the tender and that from there to the motor.  He suggested dthis might be why i am getting the continuity reading between the loco wheels.

HI,

I have recently obtained a Spectrum Heavy Mountain 4-8-2 code number 82501 second hand.  It runs fine on DC.  In trying to get into the tender to convert to DCC I disconnected the wheel sets as the tender cover did not seem to come loose with just the one screw being undone. I am not too sure if I reversed the wheels or not on refitting. It appears that the red wire coming into the tender is connected to the right hand side of the loco and i have checked that the non insulated tender wheels connected to the red wire in the tender (the front tender set)are also on that side.  I have also checked that rear tender wheels are opposite to the front ones as far as insulation is concerened.  I have run the loco on DC and it works since i reconnected everything but it will not run with a DCC chip in it and it shorts the controller.

I have tested continuity on the loco and i do get a reading of about 66ohms between the right and left wheels when i assumed there would be an infinite reading. I have also tested continuity betweeen the wheels on the loco and tender and i am salt getting readings of about 66ohms.  I'm wheels on the same side i am getting readings fo about 6ohm.

Is there a wiring diagram available for the loco and tender as the instruction sheet does not have anything in it on wiring.


On the 8 pin socket in the tender it appears that pin8 is marked although the number by the pin may not be supposed to be the PIN number.  IN fact if i assume that is pin 8 with the blanking pin in the loco does not move on DC but if i assume it is pin 4 it does move.  Not sure if that is relevant or not.
Regards

Wayne