Eaisiest way to find out is get the VIN number off the jeep & call a Chrystler dealership & they can tell you by the VIN number.
Yes,
Under the vin plate. fold the windshield forward.
4x4 with a 4.0L inline six.
Left front corner of dash, drivers door jamb,...
its part of the VIN up by the lower left hand side of the windshield
If you call any Jeep dealership with a VIN number of your vehicle, they should give it to you over the phone for free.
call a dealer parts dept with the last 9 of the VIN and they will tell you
check the vin number
Take the vehicle VIN to the dealer with proof of ownership. They should be able to cut a new key. If not hire a locksmith to cut a key for you.
try DecodeThis.com, or CarFax.com
any jeep dealer can find the code after 1992 you need the vin number