You'll need a second set of hands to help figure out where the problem is.
Turn on your ignition switch to energize the gauges. At the fuel gauge, have someone temporarily connect the sender terminal (where the pink wire attaches) pole to ground (black wire). When they do this the gauge should read full. If not, the gauge is faulty or you do not have a good ground or a good battery connection to the gauge.
If that is successful, at the sending unit temporarily ground the the sender lead (where the pink wire attaches). If this fails, you have a wiring problem. Most likely in the ground, but possibly a pinched sender wire.
If all the above works, you likely have a bad sending unit.
The sending unit should read about 230-240 ohms when empty (float down) and about 30 ohms when full (float up).
Good luck and let us know how things turn out. Most fuel gauge issues are a wiring problem associated with the ground between the tank and gauge.
Just to close this thread..tested gauge and sender.. All were fine.. Found a break in the wire.
Ran a new wire and all works great.
Thankfully the factory color codes where correct.
Thanks for the assist.
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