Hello out there. First time on these forums. Wondering if someone with some experience / expertise might have a recommendation.

Have and 09' Ultra with Livorsi gauges. Gauges have always been solid. Just replaced the Gps antenna. First run went perfect. Second day the water temp read 0, and the oil pressure and tach bounced constantly. I cycled the electronics three or four times throughout the day with the same results. Anyone with an idea on a fix would be much appreciated.

Check your grounds and other connections.

Welcome to the forum.

X2 on the faulty ground.

Notice the gauges jump when you hit the trim button or flip on the lights? If you don't find anything right off, suggest running another ground lead directly from the battery to gauge cluster for testing. Little corrosion on a connector can be a pain to track down sometimes.