Talking to local mechanic that I trust about similar problems, and he said that it was either a loose ground wire (theoretically eliminated) or a problem with the cluster. Left a message with a guy that will rebuild cluster in a couple of hours, as apparently clusters go bad. I have found several videos that detail how to repair the cluster, but I am now moving on to professional fixes.
I am currently dealing with the engine dying intermittently. Runs fine for a few weeks, then I can't make it to the gas station without it dying 3x. Will update as I learn anything.
2005 Silver Wrangler Unlimited
33" Toyo Open Country's, other things.