K-line Big Boy Tender TMCC 2-Pin Connector?

Are you sure the bulb isn't in the shell?  Have you plugged it back in?  I'd have to pull mine back out and take the shell off to see for sure where it goes and test what the voltage is.

Sinclair,

I looked for the bulb/LED but did not see one.  I observed an opening where it appears there once was a light.  I will double check to see if somehow the bulb or LED is somewhere in the area.

Thanks for the reply,

Ron

I just opened the tender up and there is no light or LED in place.  There is a grommet where I believe the light or LED would push in.  See pic below:

It's most likely an incandescent twelve volt bulb, not an LED.

Roy is probably right, it's likely a bulb.  You can use an LED with a 330 ohm resistor, you "may" have to put a .01uf cap across the light leads with an LED to fire the triac.

Thanks Roy & John.  So do you think that the output from the plug is AC?

Thanks,

Ron

It's most likely around 9V half-wave rectified AC if you're running 18V track voltage.  It's usually coming from a triac.  Try a 12V bulb on it first, if it lights, you know you're on the right track.  Note that if you use an LED and resistor, you may have to swap the polarity of the LED to get it to light, the output is really pulsing DC to be technical.

Thanks!  That is the route I will take.

Ron

What is a good source of warm white LEDs, resistors and caps?  If possible from the same sourc?

Thanks,

Ron

If you need one or two, send me an email to my profile address and I'll set you up.  I buy them in bulk, but rarely from one source.

If you want an original style bulb, they used the 2 pin style 14V bulb.  Lionel sells them.  Probably used a bulb to help Illuminate the markers lens.  G

I replace the lame light pipe with red LED's, you can hardly see those markers they way they're designed.

Sorry, I didn't get mine out over the weekend.  Was busy playing with a new purchase.  But from what I remember, the lighting on the tender is nice and bright on mine.