Ok hopefully we can figure this issue out. My son disconnected the DVD player in the trunk after doing this without disconnecting the battery. When he reconnected the DVD player the red blinking light by the temp gauge started blinking. The key fob doesn't work any more the navigation doesn't come on when you press the button to lock/unlock the doors don't work while the car is off when you use the key to arm or disarm the alarm it doesn't work all these things from just disconnecting the DVD player. The lock/unlock button does work when the car is on so pretty much the key fob,Key in the door,lock/unlock button and navigation don't work any help would be great.

 

check all your fuses, likely you blew one.

 

Thanks I will test all fuses that would be great if it's only that issue.