Why did the dash lights, the interior light , the radio light go out?

SOURCE: Both Tail lights and dash lights are out. Fuse is OK

I had the lights on my dash and tail lights go out on my 1995 Grand Am 3.1 V6. After much investigation, it ended up being that the turn signal switch had gone bad. I got mine at Autozone - $79.99 for one with cruise, $69.99 for one without. SW860 for the non-cruise, SW859 for the cruise version. It is sometimes referred to as a multifunction switch - however, when I called and asked about that, it seemed as though the parts are NOT the same (MFS was much more expensive). Make sure you specify turn signal switch (that also controls the tail lights, headlights, etc).

In order to replace it, you need to remove the cover around the steering column - we couldn't get the lower part of the cover off and subsequently also had to pull the steering wheel (which also meant disabling the air bag), then remove the bad turn signal switch (which also controls the headlights, parking lights, tail lights, etc), pop in a new one, put everything back together (re-enabling the airbag) and then you can enjoy a life of dash lights and tail lights once again.

SOURCE: 1998 Firebird dash light and running lights...

There is a module under the dash that controls the Daytime Running lights or DRL. It might have something to do with it. You can find some more info here:http://www.chrisnovoa.com/166_camarofirebird-drl-module-color-codes

Also all that lighting goes thru the headlight switch. Try unplugging it and putting the fuse in. If it still blows its probably the module.

SOURCE: dash lights

You will have to replace the light bulbs. In order to do this, you'll have to take apart the cluster and radio to get to them. Visit www.oqcgp.net to search for fixes to common grand prix problems

SOURCE: 1994 grand Am Dash & Rear Lights

Check all the fuses, if they're ok then check the switch or wiring, it might be that the wire running from the switch to the park / dash lights is fried. Does the front park lights work? (turn switch to first click, not second one. This is park lights, second click is full on headlights) Your park and dash lights are probably all connected to a single wire from the switch via the fuse box.

SOURCE: clock doesn't light up

internal lights in the radio, call your local stereo shop & asked them if they can send your radio out for repair. It may cost less just to let them replace the radio then a repair.