Hi, I have just fitted a decoder to a loco (DCC ready, so just soldered the wires) and can't get the motor to run. I have continuity from the wheels to red & black and continuity from the orange & grey to the motor. If I put the engine on track the front light comes on and when reversing the light changes over to the rear, which indicates to me that the decoder receives signals properly. However no motor control signal gets it moving. I measure 20KOhms between the motor terminals and I wonder if that's too much. Another loco, quite a bit older, measure 10 Ohm, so I wonder if the motor is gone. Appreciate your advise, thanks! Regards, Rene
Motor is defective.
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.
Hi Rich, thanks for your quick response. Yeah, was leaning to that/afraid of that. Hope the Bachmann ones are not too expensive :-(.
Thanks, Rene
DId you measure it with the orange and grey wires connected or disconnected? It does matter - and depending on the meter if you did it with the motor wires connected it may have blown the motor drivers on the decoder. If it's 20K with nothing connected, the motor is shot - although turn it slightly so the brushes hit a different segmetns of the commutator and meaure again. It's unlikely that every winding in the motor will be open/high resistence, if it is, there may be something else wrong like a missing brush spring that is easily fixed without replacing the motor. If the other segments measure normally and just the one has the high resistence - it's toast.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
Hi Randy, I measures with the motor connected...... Hope the decoder has protection. Ordered a new motor, keeping my fingers crossed. Thanks for the advise, I'll disconnect and measure again, just to be sure. Regards, René