Lionel SD-70ACe Legacy Programming Issue

I have an older SD70 (2014) that had a similar issue.  It turned out to be the RCMC receiver board.  I would start by removing the shell and make sure the antenna wire and all the boards are secure.  It would be great if you could swap the receiver board with a known working one but, I believe there have been a couple of revisions to the boards so you would have check carefully before swapping.

By the way, that number you posted is for the operating manual, not the locomotive.

If it's a newer one with the RCMC, the TMCC receiver may have become dislodged.  Lionel 72-8261-250 describes a 2008 early Legacy model, in that one I'd check the antenna, and if that looks OK, swap the R4LC.

Thank you both for the fast reply.  This is the link for the wiring diagram https://www.lionelsupport.com/...D28264000SD70ACE.pdf    I have checked all the wiring and everything feels strong.  Got it to work once then when right back to the same error.  Whether it's in Program or Run as soon as legacy powers up to 18v lights start flickering and the horns and words start going off sporadically with no ability to control anything.  Also you are right 2008 actual model number is 6-28316.

Thanks,

Alex

I'm not sure what that link you provided is for, but it's certainly not leading to the wiring diagram.

Here's the Lionel 6-28316 SD-70ACe Parts Breakdown, as I said, it uses the older Legacy modular boards.

Your symptoms suggests a failed R4LC board if it's not the antenna connection.  The random sound triggers sound more like a failing board.

Great news.  I pulled the whole train apart reconnected every connection and then did the reset and for now it is working.  I am ashamed that I could not find the culprit.  But for now it is okay.

Thank you all again for the help.