Alright, so when I took my radiator out today to do some work and then later put it back in, I realized I had to burp the engine after it started to creep up there in temp. So anyways, after I put enough coolant in it, its running at the right temp, but how often are the radiator fans supposed to come on? I haven't checked the fuses yet, but all the sensors/harnesses are plugged in and the fans didn't come on when I turned the AC on to check. I know for sure they weren't coming on when it got hot with not enough coolant. Is there any way for sure to test the fans? I tried to do a search, but really couldn't find anything. Is the rad. sensor connected to the amount of coolant in the radiator or will it turn the fans on no matter what if it gets hot?