Good news, bad news....
After discovering that the rear running lights weren't working (front running and all blinkers worked - didn't think about checking rear running), my younger son could wait to research further and pulled the #1 fuse. It was fried. Replace the fuse and everything works.
Bad news? Well we pulled the dash back off and did all kinds of troubleshooting and online searching - only to find out it was a fuse! We had checked one fuse but not the one that counted!
Oh well - valuable lesson learned. And my son got the glory, so he goes to bed tonight with a feeling of accomplishment.