Ghost dome light?

So earlier I stepped out of my truck for about 30 minutes to get something to eat. I open my truck door and close it as usual, and then suddenly notice my dome light kicking on and off slowly. Also at the front of the cab there are some lights above the dash that kicked on and wouldn't go off. I killed the main switch and then my door light kicked on and wouldn't go off. Never seen anything like it in my life....its a brand new 2021 freightliner cascadia. Something to think about is the other day while in Utah I woke up to a dead truck. I kicked on the apu and it almost immediately started which is weird because if they were dead it would have taken a while to charge them I would imagine. Has anyone ever seen anything like this? Thanks in advance for the help.

 

The apu can recharge your batteries if given enough time. It has its own battery, just like the reefer does. I looked at my cables and everything seemed tight. Tomorrow morning I'm going to check them again just to be sure. If I can't find anything maybe stop at a petro or ta and have them test the batteries? What do you guys think?

 

Just an update. The keypad that my company uses for security stopped working, which honestly is perfectly okay with me, and in return the lights stopped doing all the wonky on and off crap. Maybe there was some crossed wires and a fuse popped? Gonna see what happens over the course of the next few days.