The IVR should have a sort of mini harness the attaches to the temp gauge then it jumps to the the fuel gauge & finally the the oil gauge... Thats the one you need to unplug & you'll actually unplug it from just the fuel gauge.... All three wires at the IVR must be plugged in... I believe the jumper harness is black but I know there will be the fuel sender lead going to the fuel gauge, it is blue.. Leave it connected to the fuel gauge & unplug the second lead to the gauge... Plug in the blue wire from the low fuel relay....

"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."