1995 Buick Century 3.1 electical help

Hi,
I have a 1995 Buick Century with the 3.1 v6. 82,000 miles. The car starts with no problems and idles smoothly. However, the following items have stopped working AT THE SAME TIME! The headlights, tail lights, climate control, radio, door chime, power door locks all have stopped working simultaneously. The windows and wipers still work. There is also an abs light illuminated which was not there before. One day the car was fine, the next this happens. Prior to the day that the accessories decided to stop working, the “low traction”, “check engine” and “abs” lights illuminated intermittently. Checked fuses, and they seem fine. Alternator replaced last year. Please help!