If all the dash lights are out then there is two causes for this. The first is all the fuses have blown the other is the relay for the dashboard lights has went out.
Check the headlight switch.
check your wiring for your lights under the dash or a bad ground
The Headlight switch is where the dash receives it's power from.
Check the fuses.
from what i know there are separate fuses for the left side lights and the right side lights so it might be a fuse
Pull the fuses out and see witch one has visible brek in it.The owners manual has all the fuses in it.Needle nose pliers should be helpful
I have a 1991 Chevy surburan and it has no tail lights and no dash lights, all fuses are good
Probably the dash fuse is blown, or the dimmer switch for the dash lights is bad!
you probably need to change your fuses you probably need to change your fuses
Fuses?
check your fuses?