general problems of the 2001 Dodge Dakota

While driving my friends 01 Dakota, at about 10-15 mph after making a right hand turn I hydroplaned and I was t-boned on passenger side. I had my seatbelt on. When the truck came to a stop after spinning around and facing the opposite direction. On impact my seatbelt failed to restrain me and I was thrown into the back seat where my head hit the rear window and I sub stained a very large gash to my head.

The stereo system stop working, the interior lights are flickering and even when the doors are perfectly closed and I am wearing my seat bell the alarm ( bell sound) start sounding when I reach the 10 mph speed.