Fuel sender resistance and gauge readings Reply #15 – February 20, 2011, 11:43:58 PM it really wont matter how they have it wired.all that matters is that your new fuel guage is capable or calibrateable to your existing fuel sender.thats what i was doing earlier, calibrating using a resistor to make it right. now, running your stock guage in parallel with the aftermarket guage may require a diode somewhere but i wont fiddle with that now unless your actually unboxing it now and trying to get it to work. Quote Selected