Just to clarify, it does it when the dash lights are turned on via thumb wheel dimmer switch. It wont do it with the lights on. I can turn the lights on, have the thumb wheel to off, and it all works fine, as soon as you move the thumb wheel and theres just a very light glow of back lighting in the cluster the gauge goes to dead empty. Kinda why I thought I had a bad switch. but nope on that one....
That would be a pretty strong indicator that the ground for the instrument lights is the issue and it is most likely robbing the ground from the voltage limiter /gauges.
