Simple test procedure:
Test 1:
Key ON
Disconnect the 2 wire connector from the blu sensor..that will default High Fan.

Test2:

At reciever/drier, thereis a sensor with a 2 wire pigtail..slide the insulation sleeves back at the end of pigtail and jumper those 2 wires ..that will get you Low Fan.

Test3:

Bring a jumper wire over to the R15 resistor [ behind driver headlamp] from battery pos. Jumper to the single wire on R15 will get you Low , jumper to the 2 wire side of R15 will get you High..If NO, then the fan is bad [ or wiring to fan]

If NO on first 2 test test, you have a fuse/relay / or reistor problem...If YES , then you have a low refrigerant problem.
Post results of these 3 test.
The first 2 test verify sensor circuits , the last test verifies the fan motor/s.

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A Dalton