Instrument cluster voltage limiter.

OK before I seen your answer, I headed to radio shack. Asked for 4 100 ohm resisters, they did not have any. So I asked for a 25, he said I have a 22 ohm. So I got a pack of 4 for a buck 58, like cheep. I hooked one up turned on the key and the gauge went to a smidgit under 1/2. So all is well from the tank forward. Then I took my multi tester and checked the ohms at the sending unit with a full tank of gas. Well it said 73 ohms. So I am guessing sunk float.