2000 Chevy Lumina Could not locate a/c circute or AC blowe

My car A/C was ok till last week.Now no cool air.Thing is blower not working when i switch on A/C. where is its relay location ???there are 2 fuse box one near battery and other below steering wheel.I cannot identify any fuse which controls a/c circute.Here blower means fan near radiator.not the one which blows air inside sedan.when engine temp. goes up both radiator fan works fine.i feel i cannot hear clutch on/off sound.so somehwere 24v missing.but first step should be fuse.where it is?that is causing problem i feel as i faced long a/c problem in my old mazda car.