I am having similar issues - but thank goodness does not involve any noise or interior light problems as of yet. In the span of a day the car started to flash its lights - fog/blinker/accessory when the car is parked and turned off. At first could get it to stop this by using key fob either to lock/unlock. Now that won't work either. Autozone battery test says all ok there... disconnected the battery and reconnected without any change of status...it did stop the flashing briefly but within 15min it was back at it.

Help - I hate my car looking like a possessed Christmas tree. Can't get to the dealership for a couple days due to busy schedule :<

Appreciate the assistance.