My cluster illumination was not working but everything else controlled by the switch worked fine. I finally got around to replacing the switch today. The cluster illumination will not turn off now. Ignition off , key out , cluster stays illuminated , and the dimmer portion of the switch gets hot. I can dim it all the way down , but the lights never turn off. The harness and plug is not melted at all. I have tried several different switches with the same results. It should be keyed on power , not constant to the cluster illumination right?