I was going to mention that if you had no gages..
usually, the aux fan should come on at ambient 75F at idle if there is enough refrigerant to trip the high side pressure sw... if not , try a little bit of rpms..
It is a good idea to jumper the fan high pressure sw first to be assured of the circuits integrity.. than you know it is pressure related [ vs electrical fan circuit] if it does not come on....
..just remember, the aux fandoes not always come on with a/c compressor on that model... it only comes on when there is a high heat load, and that takes at least 75F ambient to get accomplished..