Do the lights in other areas of the dash (radio and HVAC controls) and console (shift lever light, Power/Winter Switch, Mirror Defogger Switch) still light up?
The CB-5 Fuse in the dash fuse box supplies power to all of the above (including the lights that you say aren't working) through the Taillight Relay when that relay is activated by the Park/Headlight switch. Do your taillights still work?
If the CB-5 fuse is good, and the taillight relay and lighting switch are also good, the problem may be in your solid state Illumination controller which is the part of the lighting circuit that controls the level of brightness for all the dash lighting while also providing the lighting circuit(s) for all these lights with a ground path.