My primary cooling fan is never turning on, and my secondary if only tuning on with the AC on. Do these two fans share the same power wires? If so I have to assume that its not a wiring problem. Also, I have to assume its not a fuse/relay problem because if it was the secondary fan would never come on. I do not think the fan is dead, because the smaller fan works with ac, but neither work when AC is off. It is leading me to think that whatever turns the fans on when the car is up to temp is not functioning. Let me know what you guys think, Thanks in advance!

PS, my climate control cluster is showing it staying at 90 even when gauge climbs past middle during city driving.