Installed a new HU on my max and now the power seatbelts dont work when the car is off (after u turn off the car and open the door the seatbelts should go down but they dont) My interior lights dont light up when the doors open and my clock is barley let, verrry dim. Did i blow a fues? how are all these things related?

 

check your "electron/batt" fuse

 

there is a fuse that controls the interior lights, (not the dome light, but the lights on the doors) and the seat belts. I'm not looking at my fuse panel but from memory I think it says "electronic ignition" or something like that. My fuse was blown when my seatbelts wouldn't roll down like you described, and my lights on my doors would not turn on when they were open. you mentioned also your clock. One of the symptoms that my car was having was the clock would not keep time. everytime I turned the car off, the next time I turned it back on it would default to 12:00. also the seatbelts and lights would work but only while the ignition was turned to on. If your car shares these symptoms as well, it most likely is just that fuse.