Sounds like a short in the roller that controls the dim of the instrumentation panel. Have the roller checked. If that tests okay, then you have a short in one of the wires from the headlight switch to the body control system, which ultimately controls the dimming sensor on the rearview window (if equipped). If the car is not equipped with a daylight sensor on the mirror, then the wire from the headlight switch harness to the control unit is shorting.
Wednesday, September 24th, 2008 AT 8:44 AM