My 2005 rx8 won't start replaced the battery at mazda a week ago and now it seems its dead but got it tested and they said its perfect, my alternator tested also in good working condition problems are key doesn't lock unlock or open trunk, interior lights stereo and blower wnt turn on, car won't crank at all any suggestions? Has 105k still under extended warrenty. Ran perfectly fine then the next morning jus didnt. Wanna start and nothing worked

 

try replacing the battery in the key fob...

 

The key lights blinks when I push the button like normal but I'll swap it out jus to try it

 

try the 120a fuse it probally is out

 

No fuses blown batter checkd at autozone plus it was bought at mazda dealer week ago, interior lights dnt work dash lights dnt work won't crank keyless entry dnt work

Here's wat does work
Gauge lights headlights caution lights and gauge needles

Wed drove my car ran perfect thur morning this occured

 

usually the 120a fuse u know where that is?

 

Any CEL?