...replaced the speed sensor on the rear diff.
WHY? Put the original back.
...the speed sensor didn't change anything.
Of course not - that's like changing the knob because your headlights don't come on.
That wasn't an idea from us - that was something YOU randomly chose to do. Did you take ANY of our suggestions?
Possibly a second fuse box?
Have you looked in your owner's manual? Yes, there are 2 fuse boxes on '92-up trucks.
I am working 90hrs a week right now and don't have time to take everything apart.
Then DON'T. We're trying to help you, and you seem to be following your own path.
What exactly does this mean?
Recently the odometer, speedometer, radio, and dome lights have gone out.
How recently? What else happened around that time, or just before? Does the odometer show NOTHING, or does it just not count? Is the radio display on, but no sound from the speakers, vice versa, or nothing at all? Is it only the dome lights, the dome & map lights, all the interior courtesy lights, or also the hood lamp?