okay so recently my radiator blew. i changed it and found out radiator fan one isnt working. turns out radiator fan one is for my a.c. next day i jump in my car after work and it blows nothing but hot air once the a.c. turned on. i drive for a bit and its freezing cold. i popped open the relay and pressed it and the fan turns on and my a.c. is cold. so i know its not the fan its self. i tested the a.c. system for any broken sensors thru the system test and nothing came back wrong. so i dont know whats wrong with the fan. my brother told me if i hook up fan to turn on with fan 2 their a chance the computer of the car will go to dummie mode and hold my rev limit low and also the mph. any suggestions to what the problem could be?