All my accesory electric items(guages, battery indicator will go way low, lights, blinkers, radio, heat, odometer) will all of a sudden either go way low or turn off completely for no apparent reason. But the engine and everything else still runs and drives fine. The ABS light will come on though when I hit the brakes. And sometimes if you slam the passenger door hard it will snap it out of it, make everything work again? I am stumped.... HELP PLEASE!!!