dead rear tail and dash lights

[acidrumz]

i am trying to solve a electrical issue here. the car is a 92 talon awd. when the driving lights are turned on, the tail lights and dash light does not turn on. headlights turns on. brake lights all work normal.

checked all the fuses underhood and kick panel, all good.
would there be any bad relay or the such?
would the light dimmer switch be at fault?

thanks for any help.