My fan wont turn on even when the AC is on, also noticed that the ac clutch wont come on either. I checked the fuses for the fan and ac, the relays are good, Power on coil side 86 of the relay is good but notice voltage on the other side 87, so its not grounding. There is continuity on both fan and ac clutch grounds from the (under-hood)fuse box to the pcm. Also ect sensor seems good when I disconnect the ect sensor connector, the cooling fan turns on so that means the fan is good. Any suggestions? Also one more question, how does the cooling fan work when the ect sensor is disconnected(wiring diagram if possible)?

That exact same thing happened to me. Turned out I had no more fluid in there. Clutch will go into safety mode when the AC is run dry. So it will spin but not engage. That was on my 00 z24.
Before filling up the system get it checked for leaks or you will be back to square one.