If you got a ohm meter you can check it.
I've had fuses that looked good but weren't when checked for continuity.

you can test it either of 2 ways -
with fuse removed, check for continuity with ohm-meter.

with fuse installed, check for 12v on both sides of the fuse at the little exposed metal probe points.

All I've got is check lights. I will be getting a meter here pretty soon though.

you can test it with a check light. it will light up with presence of 12 volt.
but - you have to test both sides of the fuse at the probe points.

And do not check for voltage on speaker wires. Useless. Remove speaker wires from speaker and radio and ohm out each wire.

Lights up at the IOD. I would say its just the stereo but the mirrors also dont work. And when you try to turn on the stereo the speakers make a sound like its trying to turn on so I know there is power. But the clock doesnt even work. This beats all I've ever saw.

stereo has two positive power wires... one for memory and such and another that turnas on and off with the ignition.... if you lose one the stereo wont work right and youll have no clock and such... IOD is one of the fuses in in for the 12volts to the radio that is constant for preset memory and clock... I bet you fried that fuse ....

+1 on IOD, pretty much bet it's toast.

There are three fuses with special plastic caps on them. 2 yellow, 1 black.(no silver) It is most likely the black one. Fuse #12 side of dash.