Sockets behind the gauge cluster need to be cleaned. Remove the facia, remove the instrument cluster, clean with CRC contact cleaner, reinstall, should fix it. Known problem in Jeeps. Plugs and sockets are self docking, don't force them when putting it back together. You might even want to put some dielectric grease on them before reassembly.
Disconnect the battery and let it sit for 30 minutes before starting, chance are the air bags won't go off but why take chances.