radiator fan not working on 1998 Nissan Altima

ive replaced the radiator twice. and just figured out that the fan isnt comming on to cool the radiator. when connected directly to the battery the fan works. but was wondering if its a sensor problem and if so where do i find it to fix it? all 3 relays are working properly.

Asked by for the 1998 Nissan Altima
1 answer
change the big fuses in the engine compartment! they look different than the average fuse, should be labeled too.