Oil temp gauge off scale

[Pasturepilot]

@Huitt3106 I had a similar problem after some recent work. Oil temperature either pegged out or showed 80 degrees. Got to chasing wires and the temperature gauge waved like a flag in the breeze when I wiggled the wires just outside the temperature sender’s cannon plug. 
 

One of the pins had broken loose inside the plug and pushed back just enough to make contact... sometimes. Got it together well enough To function while I wait on a new plug to arrive. 

[Huitt3106]

I went and pulled the oil temp probe today to find a replacement model number.  My thinking was that if it was around $100 it would be worth a shot to replace it and see if the reading was corrected.  After finding the part number, my mechanic and I figured out it was a bit more expensive to replace.  The updated part number is MS28034-1 and is a textron product.  The old part number is AN5525-1 and was made by Lewis Engine Company.  Does anybody have the ohm ranges for this probe so I can check that to determine if the probe is bad or if the next step is looking at the gauge itself?  The cost for the probe is around $340 (my mechanic's price).  Its $419 through aircraft spruce (https://www.aircraftspruce.com/catalog/inpages/oiltempgauges5.php?gclid=CjwKCAiA98TxBRBtEiwAVRLqu34zKCg-Jnoj-BbNK7ZKSORcPP6Dluqsr9z51anu15lx-FzL_oBc8xoCVtoQAvD_BwE).  I would love to just go ahead with an engine monitor but the funds aren't available yet.