Double-check all the fuses in the fuse block. A blown fuse could be the culprit.
Power Distribution Center
There is a power distribution center located under the hood on the driver's side of the vehicle. This is a central junction for many of the electrical circuits in the Jeep. Check all the connections and wires in this area to make sure everything is secure and there is no damage.
Ignition Switch
The ignition switch is responsible for providing power to the gauges and the ignition system. Check to make sure it is functioning properly.
Grounds
Check the grounds. It might seem silly, but a bad ground can cause an incredible number of strange issues.
Computer
An issue with the computer could also be causing the problem. This is something you will want to have a professional look at.
It's also possible that the problem is caused by a combination of these things.
