1998 buick century only high beams and turn signals work. No headlights. I have checked breakers, relays,fuses,power at headlight switch, power at headlight harness, all are good.

The Buick Century is equipped with a multi-switch. This switch is an all in one switch that controls your cruise control, windshield wipers and turn signals in one switch. This switch also controls dimming and brightening of your headlights. The dimmer switch is simple to replace, and all you need is a phillips head screwdriver to complete the task.

1. Removing the Steering Column Shroud
   • Removing the dimmer switch starts at the steering column. To plan this task out, access the steering column by removing the screws holding the steering column shroud in place. This will expose the turn signal lever. Remove the lever by twisting it forward, and pulling it out of the switch.
     
   Removing the Dimmer Switch
   • The switch is held on by two screws and a wiring harness. The wiring harness can be removed by prying up on the locking tabs and pulling the connector out of the socket. The two screws can be removed with a phillips head screwdriver. The switch will slide out. To install a dimmer switch, be sure to repeat these steps in reverse order.