the nuts are for tha amp guage- ignore them-but make sure they are tight!!!!!!!!!

as stated- check the pin that is on the board that feeds the fuel gauge- better still- solder all of them as they are a source of issuses later!!!


since you had grounded the wire at the tank and there is no full reading......

do the same by grounding out the temp. sender and see if it pegs out- if so the VR is probely working right! if not....

check the voltage of the VR- it will be pulsing to 12 volts- but if you average it out it's about 5 volts to feed the gauges!!! if it is old- replace it!!

best bet here as stated it to find another fuel gauge and swap it out.