The main fan is the one between the radiator and gearbox on the vr4.my aircon fan is behind the grill.when i first got my car someone had ziptied a supercheap aftermarket fan straight to the radiator cores,a bit rough but it worked,as apparantly the guy had done it 6years before. the aftermarket fan kit has 4 bolts with large flat washers that go through the cores.
Just be careful which factory fan you get from the wreckers because i didnt get a replacement vr4 one ,i think it was galant gsr or magna but it had 4 large plastic supports from the mounting ring to the fan.I had to cut a corner off one support to clear the turbo.which is just a td0516g.