[B. W.]

OK, if you want to take the time you can test a stock sender for the temp light using a meter, a thermometer & a pot of water on a stove. Measure continuity (ohms) when cold (should be open - infinity) then watch meter as sender warms up you will see the switch close, meter should read very little or no resistance (zero ohms) Read the temp on the thermometer. In perfect world, as it cools down it should go open as it cools below this temp, in reality it may not re-set until a cooler temp. You can watch & record this also.