I installed electric fans into my 89 mustang with the probe thermo sensor in the bottom of the radiator near the outlet to the engine. I ran the car and it just got really hot without the fans ever turning on. I have the switch set to turn on at 180 degrees right now to check it and its not working. I however know that the wiring is correct due to the fact that I also wired it for manual on with a switch and it works fine. do I need to move the thermo sensor and if so where. Also how good do the probe in radiator sensors work vs a thread in