My 1997 GT has some serious electrical issues i try to turn on the a/c/heat on speeds 1-4 and it doesn't turn on instead it shuts off my head lights, but it'll work on 5 without shutting off my head lights. I don't know where to begin!! I almost forgot to mention that when i try to turn on the rear defrost they won't stay on long enough to defrost the window. and the function on the blower (i.e. front defrost, max a/c) it stays on front defrost and will not switch to anything else.