This doesn't answer your question, but corrects your post.
On a 1g thermostat housing there are actually 3 sensors...

On the top half of the housing is an A/C stop switch. If the coolant temp gets too high, this will cut the a/c.

On the lower half of the housing are 2 sensors. The 2 wire sensor goes to the ecu, the 1 wire sensor goes to the dash gauge.

Anyone?

Ecm will fail.safe the ac if temp become too high. 1 wire it to the coolant gauge. Other feeds the ecm readings

Ok thanks