Older, probably Disney movie; girl's brother dies and bouncing basketballs always remind her of him?

Or something like that?

I remember that her brother (pretty sure it was her brother, at least) died a year or so before hand. I remember the basketballs would bounce and they'd have the heartbeat noise going.

I also remember the girl and a few of her friends riding in the back of some truck/car or something in the dark, possibly in the rain... I guess she ran away from home or something?? I dunno, I know it's not a lot to go off of...

But it's really been bugging me so hopefully someone knows what I'm talking about!!