This MB is used in many mid-2000's TMCC diesels. I am troubleshooting my 6-18289 CN Dash-9 #2528 Tank Train engine, that has inoperative front/back headlights, ditch lights, and number board lights, though everything else seems to work.

I have tried a spare R2LC with a feature reset, no change. I have applied 5vdc to the individual headlight LED circuits at the 4 pin chassis connector, and they work. Looks like I need to trace the MB headlight pinouts to see where to look next.

Thanks for any help,

Rod

We are never too old to learn something stupid....

Original Post

Shawn, that MB pinout is unfortunately for PCB1-11E Rev B, whereas this engine uses PCB1-11E Rev  A. Sadly, they are totally different.

I finally tore the MB out to examine it for burned traces, and ended up doing my own pinout diagram. (Needed to have that one anyway) Found no problems with the MB; everything checks out as it should. No closer to a resolution of the problem.

Rod

 

We are never too old to learn something stupid....

gunrunnerjohn posted:

Rod, did you add it to the motherboards.pdf file?

Yes John I have. Not quite ready to roll it out yet. I am making a few other tweaks and additions.

Good news on the Dash 9 however. Once I got it all back together I put her on the track, and guess what, all working once again. I am at a loss to explain what was wrong, or what is different now, but all is well. 

Thanks, Rod

We are never too old to learn something stupid....

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