my gauge was dead when i picked up my truck, a cleaning and tightening of the contacts on the sender and all was well, you can check it with a multimeter when you are done to see that it works, resistance should change smoothly as you raise and lower the float. while i was there i cleaned the screen and added a couple washers to the slides where the sender adjusts up and down to adapt to different sized tanks, every dodge i have taken apart the screws have worn through the slots due to vibration