I don’t know about your particular problem but you are new here so I’d like to welcome you and give you some advice about posting in the future: Post titles are important, “need help” says very little to the people who see your post on the sidebar. However “2020 Isata 3 running lights blinking” says a lot in just a few words and lets people who know about the Isata 3 and electrical and lighting issues that there is a person who could benefit from their experience while other people who don’t know what an Isata is or have no electrical experience know that they don’t need to bother looking at that thread.
I hope you are able to resolve your issue quickly. It sounds frustrating, especially on a brand new rig like that.
Travel Trailer: 2004 Flagstaff 25LB
New Tow Vehicle: 2017 F-150 3.5 Ecoboost, supercrew short bed FX4 Lariat
Old Tow Vehicle: 2009 Silverado 2500HD 4x4 Ext. Cab Short Bed
Travel Pooch:Sophie the Sato - Cats: Rhody and Hazy
2018:22nights / 2019:31Nights / 2020:18Nights