QSI DCRU connections

LED

Here's a link to a related QSI DCRU question.  Maybe this will help.  On the other hand yours doesn't resemble the DCRU pictured in the linked post.  Are you sure you have a DCRU?:

     DCRU QSI pin out (10/29/17) | mort1345

Mike

https://ogrforum.com/topic/dcru-qsi-pin-out

and in that topic https://ogrforum.com/...28WD%29%20manual.pdf

Then given that info + your picture- that circled diode plus another one is why they say the directional lamp is 1.5V

Best I can tell its a 90 ohm resistor. Do you know if its a backup light or a headlight connection?

Thats very helpful info. I'm going to be using this in a Williams 'J' tender and was hoping there was a backup light connection.

Another example- - the white (on this board Yellow) 2 pin is for LED markers- same exact location on this board with resistor.

https://ogrforum.com/...dcru-connector-types

What always confused me was how these DCRU were inconsistent on these connections. Here is another one I have with a different setup then the other one, I guess it depended on the loco it went in

I've seen a number of different configurations of the lighting connections on the QSI boards, almost like the end user was installing the lighting.