I replaced my A/c fan twice,got the compressor checked and it checks good but on 1996 Nissan Pathfinder

It still not working, what could be wrong with it.

Asked by for the 1996 Nissan Pathfinder
A/C compressor not working or just the fan,, or both?
I had them both checked the compressor is good and fan was replaced twice but it's still not working. Can it be the actual on/off switch ?
Possible,, has the blower resistor been checked? If not have that done.
Can you tell me where it's located , I can't find my Repair book . By the way Thank you for your help it is greatly appreciated .
It is mounted near the blower itself but this really needs to be checked out by a competent mechanic which it seem like you need to find! No luck so far it appears! ALL fuses ok?