Gas Gauge Help!

[67alldiy]

I know this topic has been discussed quite a bit however I need some confirmation.

My gas gauge is stuck at 1/4 full. Used to work fine until I pulled the dash and replaced a few things. I have checked an re checked everything and need to know.

what exactly does the resistor do on the back of the gas gauge?

should there be voltage coming from the pink wire that feeds the temp gauge and gas gauge when the ignition on? if so should it be 12v?

my gas gauge does not move when I take the wire off the fuse box labeled fuel, it also does not move when I try to ground out the connection on the fuse box, stays at 1/4 full

It also does not move when I ground out the gauge. to do this I connected a temp wire from the center post of the gas gauge to cab. is this correct?

I am at a lost to try to figure out why this would be? Any help would be appreciated.