Gauges

You have a service manual/ wiring diagram? Go to MyMopar and download them

Anything else doesn't work, like brake warning switch? (Try the parking brake?) Think about the path everything takes. The key at some point feeds power to the cluster PC board harness connector. It could be dirty/ loose, but the big issue is the pins on the board can corrode or work loose and loose connection to the PC board trace---leading to the instrument IVR connection

You have A ralley dash? (You said "all three"). If so the IVR is in the fuel gauge. That trace connects to a stud at the fuel gauge, that stud can lose connection to the trace. Loosen/ tighten the nut on the gauge stud. Could be the IVR. Again if it's in the fuel gauge, this is special, and you pretty much must replace it with an external one. "Probably" time to pull the cluster