Check fuses? Could be a bad headlight switch/ Could be an open in dimmer rheostat?
a fuse
have you checked the fuses?
Some cars have a knob for the headlights. If this knob is turned left or right when pulled out, it changes the brightness of the dashboard lights from off to full brightness.
A blown fuse can make your dashboard lights to not work in your 1993 Chevy Blazer Tahoe. A burned out bulb can also cause this.
The fuse box is on the right side of dashboard when door is open, tail light fuse will cause tail and dash lights to go out.
The fuse probably blew that controls the dashboard lights.
switch dead short bad wire test wires or trace system out
Replace the light bulbs that are burned out, usually from the back side of the instrument cluster.
Electronics FailureMost likely you have a short somewhere in the dashboard electronics and the bad part is you will probably never find it.
did you check the fuse?
fuse blown, loose connection or faulty LED's/lamps
You need a new fuse