Yea, does the starter engage but the car still won't start - or do you not even get starter engagement?

If you get no starter engagement, then yank the RCM and follow George's advice.
If you get starter engagement, well, we may have some real homework to do here.
The fact the car kept running makes me think the RCM is NOT the issue, but until you tell me if you have stater engagement, I can't help, that clue is VERY important.

It seems to me someone else experienced this VERY symptom in the past, oh, year or so. Dave? GEorge? Do you guys remember that? I'm sure the thread would be in one of the technical forums here... I swear someone spoke of "the dash lit up, speedo went to zero, but the car kept running fine..." I am thinking it was resolved, and I remember thinking "Im gonna remember this." But I don't remember the fix, just that it happened.