1990 Toyota Corolla Tail Lights

For some reason the tail lights stopped working. The brake lights work, the signals work, and the headlights work. I can't drive the car at night. Also, I don't know it the problems are conected, but the dash lights stopped working at the same time The is alot of loose wires under the dash but they have been there before this happened. Could both bulbs go at the same time? Funny coinsidence. I can't figure ot how to take off the light assembly. No screws anywhere. Help.
Thank You.
Mitch