What resistance values should I get when the float is all the way down versus all the way up when the fuel sending unit is out of the car. What do the numbers stamped in the VDO casting mean? Mine says 21/265 4.72... doed this mean when the float is all the way at the top the ohm meter should read 21 ohms and when the float is at the bottom the meter should read 265 ohms? is 4.72 the date code when the sending unit was manufactured? The resistive wire in mine is broken and I ordered a replacement sending unit and want to be sure it is close to what it should be before I put it in the tank and fill with fuel.