I received my Temp Sensor and swapped out the single wire power supply for the double wireed sensor. The 712 did not work. Replaced the single wire, the 712 worked. Checked the pins were in the right holes, check! Still 712 will not power up on the two wire sensor setup. Checked the voltage was coming through. Found what I think is the problem. In the single wire the voltage is thus...13.49v
But with the dual wire sensor the power wire only carries ...10.41v
Checked the bolt down on the terminal...all good!
Do I have a faulty unit??