Got in the 2001 3.8L V6 Automatic Mustang tonight after work. Turned the car on & started out of the parking lot. Suddenly the chime sound rang approximately 3 time and the dome light came on & will not turn off. If I open the door the chime rings, but will turn off as soon as the door is shut. This rules out a stuck door jam switch. Can't see any other problems. The headlamp switch will turn the headlamps on and off. Also will dim the dash lights. Any other ideas? Had to pull the bulb out.