1994 Oldsmobile Silhouette Lights

Your dimmer and turn are probably part of the multifunction switch. That switch could have a problem? Any applicable fuses, did you check for voltage at the fuse circuit? Even if the fuse is good, if no voltage the fuse is still dead. Use a testlight to check for voltage.

Voltage to the headlamp switch is hot all the time. The yellow wire carries voltage from headlamp switch to dimmer switch. From the dimmer switch, you can see the wire colors for high and low beam.