Not 100% sure on a '93, but earlier cars has an "emergency" release cable for the rear hatch. It is located under the carpet in the REAR of the car. You'll have to pull the carpet down to find it...it's not very long. Give it a tug, and the hatch should open. Some folks have modified the cable to make it longer, so it's easier to get to. If you have the Owner's Manual for your car, that info should be in it.
There is a problem with the release solenoid, and sometimes the relays. Not sure where the relay on a '93 is, but I can prolly find that info in the morning, if no-one else knows.
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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"