Resistor or diode or other?

yes it was between the battery and the on/off switch.  

See the red arrow in the image.  When I was testing everything there was no power getting from the battery to the on off switch, but if I bypassed that and just gave it 1.5V at the switch, it worked just fine.  

the piece was under all that black rubber

K

here is another image.  

@kmott,

I have a monorail as well but I haven't taken it apart and I haven't used it for quite a while.

I do remember one of these being inside a Plarail Advance ACS (remote control) car.

I believe it is an inductor. Taking it out shouldn't matter but I think it was designed to prevent spikes in the current when switching directions.

Next time when I take apart one with these components, I will measure it properly and when I know more I will post back.

I hope that helps.

-plarnold

[Super]

I think it was designed to prevent spikes in the current when switching directions.

That makes sense to me.

Makes sense... im gonna just put it back to get her w/o that part and see what happens

Thanks all!

[Super]

So, laying aside the disappointment of this wiring trouble...how do you like your first Monorail set Kmott?

So, laying aside the disappointment of this wiring trouble...how do you like your first Monorail set Kmott?

still dont know.  I havent had time to put it back together yet.  I did buy a monorail (no track) on Jauce, so either ill have 2 or a backup!