i know this thread is old, but i want to link all fan problems so that when searched solutions can be found quicker. here is the link to my experience. my condensor fan relay that went out did not knock out the radiator fan. so i guess they can go bad without affecting the other fan. also when i put the bad relay that would not allow my condensor fan to work in the wipers relay, my wipers work but not in the fastest setting. so i guess it was partially blown, goodluck.