When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Just kind of a shot in the dark but check the relay because unplugging the fan switch should make it turn on continuously I think. Are both fans running or is just one?
best way to check fans working is to unplug the fan sensor switch in the bottom of the radiator... if they come on when you unplug it the motors are fine. if they arent coming on when your motor is hot then that sensor is probably the issue...