Where is the dimmer switch for the headlights of a 1989 Cadillac Brougham?

In a 1989 Cadillac Brougham, the dimmer switch for the headlights is typically located on the dashboard, near the headlight switch. It may be a knob or a pull switch that allows you to adjust the brightness of the dashboard lights and headlights. If you're having trouble locating it, consult the vehicle's owner manual for specific details.