Now of course, "wouldn't you know" this is an intermittent thing. I pulled the car out today to clean the shop and immediately gas and temp gauge go to max. Then as I am turning the car around, they fall. Gas gauge to about 1/8 where I know it's correct and temp all the way down since it was just started. <rolls eyes>
Bad ground equals inop not over current to the gauges. High current, gaiuges going to max positions cannot be weak ground. It's limiter contacts sticking closed plain and simple.
Just so you know... You are flirting with disaster. System voltage will kill either the limiter or both gauges. Hopefully the limiter will go ahead and die first. It might cook the gauges ruining their calibration before it dies or it might fry them proper. Current always takes the path of least resistance and most of the time that's the fuel gauge. So... fuel gauge or in some cases oil gauge dies first, followed by temp gauge.
