I just went through a battery issue I didn't know I had / about two weeks ago my driving lights stopped working [ dial was on auto ] then a couple days ago remote start stopped working, went for groceries truck turned over like it had 100 weight oil and the next day click click. Where I'm going with this is the AGM was only 11 months old so I pulled it went back to dealer he checked it and said nothing wrong / put it back in truck charging for 21 hours it would only charge to 12.4 volts , drove back to dealer he came out with a high buck machine [ 30 mile hr winds snowing ] put it on battery pondered for 30 seconds and decided to replace. Went back to battery that manual said to use not AGM, now driving lights and remote start works again. Two lessons learned here, those big fancy testers aren't always right and a week battery don't allow things to work. That's my lesson learned, If u may have electrical issues all of a sudden check battery, she needs 12.5v to 12.7v ...