Hello! My right turn signal doesnt blink, but my left does. I've just been making it blink manually. I'm honestly not even sure if the light still comes on on the outside, but the dash indicator lights up (solid if just turned on, flashes if I manually make it)

I know Fieros are electrical nightmares, so I was wondering if this could be a blinker relay or if maybe the bulb is just burnt out? I'm not sure where to start and Kansas has decided to try to flood us again so I con't go out and look right now.

you need to check the bulbs at least before posting.
It can be a crossed filament or bad ground.

Yup...
See my Cave, Sneak Path and Lighbulbs

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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)

Yes, for sure...check the bulb if its burnt out.

If it is, install an new bulb. If it still doesn't light up, do a wiggle test.

Maybe your blinker fluid is low.

My three Fieros really werent electrical nightmares

Yeah you probably just have a bad bulb, one filament in a bulb can fail and the other still work.