ok today i hooked up a signal generator to the temp gauge wire and it seems to work fine, gauge went from hot to cold when i varied the resistance knob from 0-60 ohms.only problem is the damm sending units are all way off from those readings and they are susposed to be for the gauges i have tried 4 of them from resto sources and they are no where near 0-60 ohms, more like 250 ohms hot and 0.591 k ohms cold i have checked the grounds etc??

suggestions anyone