Quote Originally Posted by Throbbinhood View Post
Where does that coolant line go?

Why not leave it in the top hose and work from there. That way at least you've got some Continuity in your testing.
The hose I attached the sensor in above picture goes to the heater core/LPG converter. The coolant line the hose joins comes directly out of the engine block water jacket behind the thermostat(not after it). The thermostat hose in the picture carries "cold" water from the bottom hose of the radiator. So, it's lot "colder" than the coolant outside the thermostat until the thermostat opens.