For a while now the light on the Jeep's gauge will all light up. This happens randomly. I researched it and it seems like a lot of owners have the same issue and stems from a bad ignition switch. I searched the internet and found a step-by-step procedure for a Grand Cherokee but not a commander. Below are the steps I took to replace the ignition switch. I bought a new switch from Autozone for about $20.
You need to snap open the lower dash cover (it hinges down). Then pop out the trim around the ignition. The remove the two torx screws. Push the unit back. The hard part is getting it out of the tight spot. Try to orient the unit as shown below and it will come right out. Use the same position to put it back in place once you replace the switch.
Note the red locking tab before you pull the wire out of the old switch. Also to remove the old switch you must press on the two locking tabs on the base of the switch.