I have your same model 200sx and a similar problem. My dash lights sometimes flicker on and off when I hit bumps or if I touch that rolling dimmer swith that adjusts the brightness of the dash lights. If it wont come back on, I just tap it until it does. I assume this means there is a gap in the electrical connection that is on or near that rolly switch. Luckily mine hasn't gone completely out yet, and if it does it may just be a matter of opening up the panel and finding the crappy piece to fix it or replace it. (by dash lights you do mean the speedometer and tach right?)
Dash lights and tail lights are on the same fuse.
Parking/tail/dash fuse
These are on the same fuse. Check for a blown fuse.
Probably the Tail light fuse is blown. You also lose dash lights when this fuse blows also.
warning lights mean something is wrong and needs attention by a mechanic
Should be the same circuit for parking/tail/dash lights
No, this is not normal. You have a problem.
check your fuse
dash lights relay
if the dash lights you mean the gauges wont light up easy fix its the scroll switch at the left near the cruise control button pop it out and replace it the scroll button controls the dash lights. good luck sr20de ftw.
No, its a bad earth somewhere
it's under the dash on the passenger side. you'll have to look up under the dash. i had to change out the blower motor relay on mine. it would only blow on speed 4.