The radiator Fan in the car stopped working. We didn't know what the problem was and research it. To make sure that the Radiator fan itself wasn't broken we checked the relay of the fan. The relay seemed fine so we used a paper to finish the circuit without the relay to see if the fan would work, which it did. So we know that is not broken. We assumed it was the relay. We replaced the relay, coolant temp sensor, and thermostat in the engine, but the fan is still not working. We are not sure what the problem could be.