I have a 1998 c5 corvette. have no tail lights , no dash lights or fog logs and no lic plate lights.

hi Richard
yes wiring could be the problem but your wiring loom should not need replacing may only need repair, check your lic. plate bulb socket for power with the running lights on / check wire from bulb to left/right side for cracks in the insulation of the wire (looking for any shorts)
the lic. plate lights get power from the tail lights (running lights) if your running lights are not working also u may have a blown fuse
if not look for a brake/cut in the wire going from the tail lights to
lic. plate light sockets.

On "most" vehicles, the parking, tail, lic plate AND dash lights are all on the same circuit. Usually, the fuse will be labeld "park", "tail", or "illum".
If you have dash lights but no park lights, it's likely that there is a break in the wiring somewhere...

Your Lights Have A Direct Short Some Where Causing Fuse To Blow - Common Problem With Older Vehicles Especially If They Have Been Used For Towing / Plowing .
Check Light Sockets and Bulbs , Look For Frayed Or Melted Wiring

Replace the light control switch and if it is a separate adjustment the Dash board or Interior light brightness adjuster. Most likely it is the Light switch so start with that. This assumes all interior fuses and fuses and relays in the power distribution block under the hood are good.

You may have blown a fuse or two. Have you checked fuses?

RH Tail, Number plate = C7 RH box
LH Tail, Number plate = C7 LH box

RH Reverse, Rear Fog = B8 RH box
LH Reverse, Rear Fog = B8 LH box

burnt diodes on the back of the dash can give this fault also, have somebody check the electrical contacts...

the lic plate lights recieve power from the tail lights circuit, do they work?

Check and replace any blown fuses.

Check the switch that brightens and dims the dash lights

disconnect head lights, and replace fuse. Then turn the light back on to see if it blow a fuse again. if not, plug on light in at a time. You might have a bad headlight???? then unplug that one if nothing happens. Then plug the other one in. It could also be a bad taillight bulb. I have had bad tail light bulbs. Do all of them, one at a time.

look in your trunk there should be a cover on the back of your tail lights in the trunk. Look under it