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All is good now. It is now reading as expected.
Im a dumbass. Glad I posted the pictures. I assumed the pin out was the same on the RAMPS as it was on the PT100. I should have known better.
Not sure if this helps.
Its a RAMPS 1.4 and is connected to AUX 1
This is what I used.
I just upgraded to a PT100 on my v6. Following the config changes on the wiki for the PT100. When I powered up the printer. The display shows...