Ok, I shorted out with screwdriver and the fans come on at low speed (relay clicks as well).
I do not know where the resistor is behind the headlamp.
Also with regards to checking the accuracy of the gauge reading, I have a fluke meter so i can do that part. Do I just measure resistance of the resistor, then do the math shown on some other posts with regards to what temp that should equate to? Then look at the dash and see if it jives?
Also for this test I started the car and let it run for 5 minutes and the hoses coming off the radiator were super duper hot already. This was in my garage which is cool. Still posibility that the incorrect coolant was used and it's running hot?