Cooling fans hi & lo

[CoBeerToad]

Had a bad resistor. Fan would not function at low speed. Hi speed, no problem.

So after about 3 years, I finally attack this and replace the resistor. I started the car up and just let it idle while I was cleaning up the garage. Once the temp needle hit the middle of the zero, both fans kicked on. Yippee!
Then I thought about it and how do I know that was low speed? I don't have an A/C button to press anymore. (Another issue, don't ask.)
I guess I will have to take it out and beat it up some to get the temp high enough to trigger the hi speed.
My question is, anybody know what temp triggers the hi speed?