i'll let someone else link it, but mike miller in roundel this month had some tips.
1 - when you splice the wires, make sure to go far enough up the harness to get clean (non corrision) wires.
2 - the wires have to be soldered.
3 - you can't test the temp sensor sitting in the garage, you actually have to take it out and drive it to test if it is working.
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