Marker Lights

Just look for another similar one, search parts on "marker".  Here's one of a number of possibilities.

Thanks.

I purchased the suggested item from Lionel and installed it - no lights.  My simple approach to troubleshooting was to first check that there was voltage coming from the locomotive tender.  The only way I could easily hook a meter to the input to the LEDs was to cut the leads on the new wiring harness (the plug in the tender is male and difficult to access).  I hooked the DC meter to the leads and it pegged on "0" volts, i.e., wrong polarity.  I inspected the leads more carefully and found that the new harness reversed the polarity coming from the tender.  I connected the LEDs to a DC power supply and was gratified to see that they lighted.  I then soldered the LEDs back to their harness connector in opposite polarity, and all worked properly.  Not sure if the harness was constructed improperly or if Lionel changed their polarity convention on the locomotive for which this harness was intended.  Either way, I learned a key lesson:  before installing any constructed harness, I will check to see that it follows the convention on the existing plug (i.e., locomotive/tender).