Another en-"gauging" mystery
 

Over a year ago I replaced my "in-cab" fuel tank and sending unit. A few weeks ago I let the fuel get low to lighten up the tank so I could do some cab "embellishments". I go last week put in 3/4 a tank, so the gauge said and by the time I got home it said I was down to 1/8 of a tank. I went and wiggled the wire from the sending unit and the needle did not move.

What's the deal??? :banghead:

Just an idea: attach a jumper wire from one of the screw heads on the sender to a known good ground and see what your gauge does. Could be you have "ungrounded" you fuel tank sender.

Or you could have a hole in the float..

Where is the ground usually located?