Dash lights wont work

The first thing I would check is to see if any of the wires you changed grounded out and caused a fuse to blow. Also it is possible that when you hooked up the lights to the radio it went to the wrong wire causing the problem. Also it is possible that as you worked putting in the radio you accidentally came in contact that feeds the dash lights. So check your fuses that controls the dash lights.
If you pulled the dash panel the dimmer adjustment on the light switch may have been turned off.

One of the wires is most likely touching metal. I believe both work off same fuse

From my wiring diagram power for the radio is fuse # 29 a 25amp fuse! The fuse for cig lighter also powers the DLC Pin # 16 . The DLC is the connector under the dash left of the steering wheel . This is where you would hook up a scan tool ! Are you saying by part dash lights ,that some of the dash lights are out ? Could just be some burnt out bulbs ! Was fuse # blown ? Did you cig light work before ? Could have a shorted out cig. lighter or the outlet ! To fix dash bulbs the instrument cluster would need to be pulled ! How to Replace Dashboard Lights In Depth

back light dead.
so use the dimmer knob. all cars have a dash dimmer that runs all car parking light on, dimmed lamps. all.
so fiddle that.
get the operators guide, (lost) ????
read the pages on dash dimming.
if that dont fix it, check fuses. next.

Check the fuses sounds like a fuse problem the often dont com alone

some main fuse boxes are under the hood in a square black box, some autos hide them under the steering colume under the dash.

Most likely you got the illumination wire for the stock radio grounded. The stock radio has lights in it that are connected to the dash lights to illuminate the dials of the radio. Most aftermarket stereos don't have a hook up for that. The wire may have got hooked up to ground. I would check the fuse to see if it's bad. Also you might want to undo the new stereo, replace the fuse, if it's bad, and check the wires for battery when the headlights are on.

Make sure the radio is wired up correctly,if it is then the radio it's self is causeing the problem.One way to find out for sure is to unplug the radio and see if the lights return to normal.

Pull it back out, (Radio) and recheck your steps. Something is not hooked up right. When you pull it back out, See if it goes back working normal. Retrack the wires. You cut are hook up something wrong????

you have the radio hooked into the illumination wire most radios this is a orange wire try unhooking that