Thanks for the replies. Yeah, it seems I'm getting my education through my charge card. I found a 12V conversion plan on the internet as soomeone was sharing their plan and parts for upgrading their AD. Seemed thoughtful too me, so I followed it. This was early in the game (before recieving catalogs). The IR4 is pricey compared to what what other candidates cost.

I was thinking last night, my test light might be doing the blinking. It only does it on the output side of the IR4. I'm going to "invest in a volt meter". I've needed one for years. I hope it comes with directions!

For those newer than me at this...the fuel gauge troubleshooting guide at FIFTH AVENUE imo is excellent.