Had the same issues. There was a TSB issued for the bed plug that included replacing the inverter and all three plugs. My local dealer replaced the inverter and only the bed plug and got everything working.
Late posting, but thanks to Bruce with Hush audio for the harness to connect my Kicker Key to my factory unit. I inadvertently messed with some of the plug configs when it was sent to me (I thought I was smarter than the labels). Bruce had no problem answering questions and even talking on the...