Several problems with 2000 Chrysler 300M

defrost heater turns on by itself and if you turn the air cond. on it shuts off and then the heater comes on. in addition key bob lock doesn’t work, brake lights are on and electric locks on doors don’t work. button to open truck doesn’t work. all this happen at once, door and trunk can only be opened with key. I pulled the two fuse that operator the ac and blower. its a 100 degrees here cant drive with heater blowing, would be fine if I cut it off but wait a min and it turns itself own. any suggestion is welcome. I have never seen so many thing shut down at once.

Has the car been in a lightning storm recently?? Or maybe the body control module has shorted internally due to age. Or wiring eaten by rodents?