it sounds dumb but heres the problem:

cars been runnin ok except my power ban has gotten weaker and when i get to about 6 grand my headlights and display get insanely bright. the headlights get brighter than teh high beams when this occurs. i have no idea what this could be besides some kind of weird alt problem or a short somewhere.

i hope someone has had this problem before and can fix it, please help. Thanx