No tail lights!

I really hope someone can point me in the right direction on this. I suck at electrical problems. The story so far ....
The car is a 1993 SCoupe Turbo. My son bought this as a secondary vehicle for the winter.
 
Headlights work - but he has no tail lights, parking lights or dash lights. I'm suspecting that this all is on the same circuit. I have checked the fuse panel under the dash and didn't see a fuse designated for the tail lights or the cluster. I checked the fusible links under the hood and they're good. I checked the tail light bulbs and the filiments are in tact. I checked the ground for this lighting assembly and its good. I bought the only manual I've seen available on this vehicle - the Chilton Hyundai Coupes/Sedans 1986 - 93. It might as well be in latin because the book is vague at best. Does anyone have any suggestions or methods I could try to pinpoint the problem and fix it. He just moved out and needs the car to commute.  
 
Thanks in advance.
 

i'm not really familiar with the car but if all fuses and bulbs are good, use a test light and check at the sockets to see if you're getting power/voltage. that way you can back track, check behind the socket and remove the bulb to see if it's a voltage problem or faulty socket. it could also be a connector both harnesses plug into for the tail lights. just my 2 cents

Thanks madindian1. I thought about that today. I was hoping it would be a simple burnt fuse somewhere.

no problem