gauges might be out already due to the little voltage limiter plugged into back of instrument cluster (its directly behind those 2 gauges)

Radio..original or aftermarket? If original the speaker is either rotten or it's baked. it has a red wire/orange wire pigtail that plugs into the rest of the dash wiring, and a lime green/black wire that runs to speaker, check those connections, and the ground strap on the radio.

When I got my duster I though the radio didn't work, i didn't even hear a "tink" when i turned it on. Well, speaker was rotten.