2016 honda odyssey exl. My odyssey has started to do some strange stuff. When the car is parked the headligts and interior ligts randomly come on and the alarm goes off . The gauges on the dash all start lighting up flashing and I hear relays clicking . It constantly is running the. Battery dead . I took it to the honda dealership and they replaced the engine wiring harness. $1700 and did not fix anything . I am thinking it is the body control module but I am not familiar with Honda's. Any thoughts on this ?