Found this on top of gas tank in the 69 Cutlass rag top. Had to drop the tank after trip to W.V. & gas gauge decided to go on Holiday's too!!! Bad connection from rheostat to "pin" where wire goes on sender to body harness. Car has had a replacement tank some where along the line!!! Fixed the problem with just labour, saved a $ 100 for new sender unit !! All is WELL