Hey all, i'm actually working on a crossfire, same setup as a slk320. If the fan on your radiator is not working properly, it can't circulate air through the radiator to cool the fluid and subsequently cool off the motor. Pin On Computer Info This sensor is connected to the ecm, which controls the radiator fans. Radiator fan not working properly . Look for corrosion and damage. Car overheating & radiator fans not turning on: Ok so the original fan stopped working, i tested it manually and it just shorts out internally. See how hot your ect gets during your commute. #2 · jun 29, 2014. 2002 pontiac grand am cooling fans. Hopefully the problem is not in the ecm. It seems like the fan has a stage 1 and a stage 2. Your car's radiator holds coolant fluid for the motor to ensure that the motor doesn't overheat. An a/c system requires a. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damage...