FYI, you shouldn't have to jack up all 4 tires, just the front 2.
You have manual hubs on a 94? must have been converted from the ADDs? If it's manual, just turn teh tires and see if the CV spins. If it's the ADD, you'll have to see if the other tire spins the other direction.

Or... my favorite... pull the rear driveshaft, engage the case, and see if you can move! (just be prepared to turn it OFF before unengaging the t-case if you don't, lol.)

With 200+ Billion electrical parts, the world most complicated machine is inside your own skull.

Question Reality.
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'89 Rnr DLX "SR4.5", 32s w/ 5.29 locked f/r blah blah