360 LH Radiator Fan Not Working, Works With 12v Applied Direct

Hi everyone, trying to work out this LH Radiator fan issue. I applied 12V Directly to the fan and its working properly. I was running MaxxiECU Diagnostics and forced the temp up to 110 Degrees C and the fan still did not come on. Checked the Large 30amp fuse in the front boot, tested R28 with 12v and its clicking, and tested the relay on the RH Fan with 12v, its clicking. I have the Thermostatic Switch out and I am testing it for resistance using a multimeter and boiling water. I am not getting any reading besides 1. This includes ice water, and boiling water. I have tried the multimeter on all of the OHM settings. When I tap the multimeter prongs together the reading zeros out. I wanted to check my method of testing the switch here to verify my testing method is correct.

When I removed the switch, coolant came out, so I believe there is no air in the system and the coolant level is correct

Thanks in advance.

Kendall
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Thanks for the response and the schematic.

I left out that the RH fan runs with the AC on.

After seeing the schematic I ran a jumper between pins 1 and 3 and pins 2 and 3 and was able to get both fans to fire.

I have another multimeter at work that I am going to test tomorrow.

My thoughts here are that I have narrowed it down to either air in the system and coolant isnt hitting the sensor properly, or the sensor in bad.

Both seem like manageable fixes at this point.

If anyone else has any feedback on my method it is appreciated. My extent of previous multimeter testing knowledge is just checking for power, so I never use any of its other functions, and was trying to learn from a youtube video.

Thanks again!