Gas gauge blues

[luvbowties]

Originally Posted by 72 5500

The needle moves freely and when the key is on the needle goes to empty. Pink wire has 12 volts when key is on, brown wire is conected to the sending unit. The ground wire on the sending unit is grounded. I pulled the sending unit out of the tank and moved the float to full and empty with out any movment of the needle.
I'm thinking I still have a bad gauge.

You need to run this same test once more, EXCEPT with the tank-terminal wire disconnected from gauge AND from sender. Run ANOTHER, separate wire straight from sender-terminal to tank-terminal of gauge. What happens now when you manually move the float to FULL and to EMPTY?
Sam