I have one of those rev. glow guages and had them for almost a year. Lately, the thing would turn off by itself. It will turn on and off randomly. Sometimes it will stay on for a week or so without any problem. Then there are other times it just wont do jack shit. I did check the connections many times and couldn't find anything wrong with them. Have any of you guys opened up the actual circuit box/converter or whatever that black box that's connected? Because I noticed that thing gets REALLY hot. Or is there something else I can check? TIA