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Do you have power going to the compressor when activating ? And do engine fans come on high speed when Ac is activated ?
Did you check the fuses on top of the battery ? The strip fuses and he 3 30amp fuses ?
Check the wiring going to fan control module since you have no power to the fan module that needs to be the next step trace wiring
Do you have access to a wiring diagram ?
Not sure but do they have wiring diagrams there ?
This breakdown of the pin out of the fan control module should help you figure out what your missing . I hope this helps.Please dont forget to provide positive feedback for the help provided we as experts rely on this thank you