I JUST BOUGHT A 2003 EXPLORER XLT [159,000 MILES ] ,MY OIL GAUGE AND BATTERY GAUGE STAY AT THE 1/2 WAY MARK WIYH ENGINE RUNING,DROPS BACK TO `0` WHEN I STOP THE ENGINE,BATTERY STAYS THE SAME ,WHEN I TURN ON HEADLIGHTS [ STAYS 1/2 WAY ] ,OIL STAYS THE SAME [HOT OR COLD ] , I`M NOW WONDERING ABOUT THE GAS GAUGE [WHEN I FIRST GOT IT, IT WAS ON EMPTY, IT TOOK 20 GALLIONS TO FILL UP ] I DROVE 60 MILES ,GAUGE ONLY DROPED A HAIR, WATER GAUGE WORKS FINE.

All your gauges are working. The gas gauge Is also working. When you fill it, you will fill over the limit the fuel level switch will go by a couple of gallons. So the gauge will not drop for a few miles. until you use up the excess fuel

Unfortunately ford gauges run (oil,volt) run off the ecm. They run like "Idot lights" ether on or off. They are not Live like a oil gauge or a volt gauge should be.Ford has done it this way form the 90's on up.I have seen a ford volt gauge move a little while jump starting another car, thats about it. Chevy gauges are also run off the ecm but seem to react as if they were "Live gauges".