Newb Question.

[santa]

The logger one is the sensor with 2 wires going to it. The dash one is single wire and like a spade connector. Both are on the thermostat housing. The dash one is not very linear. It will stay in the middle for a wide range of temps, too cold and too hot. The logger one is the important one, since it's the one that actually affects what the ECU will do as far as fuel and timing.